Why is my key not working on my Mercedes?

Maybe your key fob isn’t working or car battery is dead and you are trying to unlock the trunk of your Mercedes-Benz. If your car battery is dead or the key fob remote has stopped working, you won’t be able to unlock your Mercedes-Benz or open the trunk. Keys locked in the trunk How to open Mercedes trunk.

How do you unlock the trunk of a Mercedes Benz?

Connect a jump box positive terminal to the positive terminal and the negative jumper cable to a ground point or frame. Alternativly instead of a jumper cable Now you can press the Lock/Unlock buttons on your Mercedes-Benz key fob remote to unlock the car or the trunk.

What should I do if my Mercedes FOB is not working?

If you need a replacement battery note that Mercedes-Benz uses CR2025 battery type. Ensure you have new batteries in your key fob. Next, look carefully at your Mercedes-Benz key. When you press the button on your key you should see a small RED led light.

What should I do if my car key is not working?

A good first step is to change the keyless remote battery. (If you’ve already done this, keep reading.) When you press the button on your key, look at it carefully to see what happens. You should see a red LED light, and this should appear whenever the Lock, Unlock, Panic, or Trunk button is pressed.

Where is the fuse box on a 1998 Benz ML320?

The main fuse box is located in the engine bay. It is on the left (driver’s) side of the engine. Pull the two tab toward the front and you will be able to lift up the fuse panel cover. Fuses in the engine bay ML Class 1998-2002 W163

How do you open the trunk of a Mercedes Benz?

You will need to slide the locking tab with your thumb and pull out the metal key. Step 2. Insert the key into the trunk lock cylinder. Step 3. Turn the key until you hear the trunk pop open. Note: Avoid jump starting your Mercedes-Benz by connecting the jumper cables directly to the battery.

What are the common problems with Mercedes key fobs?

Common Mercedes Key Fob Problems Go to top 1 Mercedes key fob not working after battery change 2 Mercedes remote doesn’t work anymore 3 Keyless remote doesn’t lock/unlock the car 4 Mercedes key fob won’t unlock doors 5 Panic button doesn’t work 6 Trunk unlock doesn’t work

Is there a bypass for a Mercedes immobilizer?

If the vehicle only has 2 keys and 1 can not be spared, a new key must be purchased and codedto the vehicle by the dealer. That key can then be used in the bypass. Ideally, using an original Mercedes Transponder coil part #1684620253 would be best. The Mercedes coil could be tied in to the relays.

How do I Sync my Mercedes fob to my car?

To synchronize a Mercedes-Benz key to your car all you need to do is insert the key into the ignition for a few seconds. This works in most cases but every now and then you may need to follow further instructions to synchronize your Mercedes key fob remote with your car.

What happens if you cant open the trunk of a Mercedes Benz?

Here are a few similar scenarios. The car battery has died and the battery is in the trunk. You locked the keys in the trunk and the battery is dead. Or you tried to manually unlock the trunk but can’t turn the key manually. So what do you do? Luckily, there is another way to power up your Mercedes-Benz.

Where is the jump start terminal on a Mercedes?

Release hood by pulling on the hood release lever on the side of the dashboard. Next, open the hood. All Mercedes-Benz model year 2000 and newer have a jump start terminal inside the engine bay. Regardless if the battery is in the trunk or under the rear seat. Locate the positive jump starting terminal.

How do you open the hood of a Mercedes?

Get a locksmith to open one of the doors then follow these steps. Release hood by pulling on the hood release lever on the side of the dashboard. Next, open the hood. All Mercedes-Benz model year 2000 and newer have a jump start terminal inside the engine bay.

What kind of key do I need for my Mercedes?

Fob car key – Fob remote “push to start” car key: Usually looks like some sort of remote. This fob car key has a chip and therefore will need to be programmed. The next image is of a Mercedes key that has a transponder chip in it and therefore NEEDS to be coded.

What kind of car keys have you lost?

What type of Car Keys have you lost? 1 Transponder Chip Keys. Most cars after newer vehicles have transponder chips are programmed to a specific car. 2 Remote Key Fob. These are generally a keyless entry push button key that controls the locking to doors of the car and turns off any alarm system. 3 Non-Remote Car Keys. …

What to do if your Mercedes Benz key fob is not working?

1. Put the key in the ignition. 2. Quickly remove it within 10 seconds and hold down the Lock button. 3. While holding the Lock button, press Unlock five times. 4. Release these buttons and press the Trunk button once.

How to get the key out of the ignition?

1 Put the key in the ignition. 2 Quickly remove it within 10 seconds and hold down the Lock button. 3 While holding the Lock button, press Unlock five times. 4 Release these buttons and press the Trunk button once. This should synchronize your remote.

What to do if your keys are locked in the trunk?

Break into any modern car, and the alarm will go off; often shutting down the electrics responsible for the trunk release. The technician will need a series of tools to break into the trunk, including a snake camera. When the technician arrives, remind him or her again of the situation. When mine arrived I assumed he knew what was going on.

How can I tell if my key fob is defective?

When you press the button on your key, look at it carefully to see what happens. You should see a red LED light, and this should appear whenever the Lock, Unlock, Panic, or Trunk button is pressed. If you don’t see this light, the problem is that your key fob is defective.

What causes a key to get stuck in a lock?

The culprit could be just a loose part of the lock assembly, a sharp burr or ridge on a new key, or a bend in an old one. Forcing a key can cause it to break off in the lock, so take a deep breath and give one of these easy fixes a try.

What to do if your Mercedes key is damaged?

Use a Mercedes key cover to protect you key from accidental damage. If the key fob shell is damaged, consider replacing you Mercedes key shell with a new one. For some models, you can order a WALLET KEY which will unlock and start the car but doesn’t have the door keyless functions.

Can a locksmith make a Mercedes Benz key?

Not all locksmiths can make Mercedes-Benz keys but in most major cities, you will find locksmiths who can make Mercedes-Benz keys. What do you need to order a new key?

What’s the best way to remove a car key?

With your other hand, use the tip of your finger to push firmly on the face of the plug next to the key. Gently twist and pull the key out. The light pressure applied in Step 3 prevent the plug from shifting as you try to remove the key.

What should I do if my key fob is not working?

Remove the metal key from the keyfob and use it to manually unlock the doors. Next, you need to check the fuse for the central locking circuit. Not only that but also look at the fuse for the Antenna Module and AAM.

What kind of key is in the trunk of a Mercedes?

I locked the primary electronic key (the one with the internal manual key blade) in the trunk of my 1998 Mercedes Benz E320. The car was unlocked, but my trunk release switch on the center console did not work. I looked for solutions on the Internet and tried the “bottom two fuses removal” and “remove rear seat back” methods, to no avail.

What happens if you lock your Mercedes in the trunk?

I have a Mercedes e500, it was one of those days, I unfortunately locked my key inside my trunk. A locksmith was able to open my door but as many of you probably already know that wasn’t much help. Seats won’t move and since alarm is on, the release button inside the car will not work.

How do I get the key out of the trunk?

Drill whole in trunk underneath liscense plate frame about one inch below and one inch to the left from the keyhole of the trunk, pull up on golden rod and the trunk will open 1 people found this helpful.

Can you lock the trunk with a key?

The drivers side door can’t lock unless you use your key. After taking the back seat out, to no avail, finding out that there is not any easy way to get in the trunk, I began manually pulling all the hand locks up and down until I heard a pop in the trunk.

What to do when your car keys are locked in?

Insert a wedge into the top right corner of the driver side door, and start inflating the wedge. Once enough space is created, you can insert an access tool to reach the car lock. Instead of calling a locksmith in an emergency, have a spare car key already stored in a safe place.

What happens if you leave your car key in the trunk?

If your trunk is unlocked, and your key is in there, then you have come to the end of your journey (this is unlikely). However, if the key is in the main compartment of the car instead of the trunk, you will have a bit more work to do. For some vehicles, access to the main compartment of the car can be granted via the trunk.

Where are the spare keys in the car?

You may want to have a spare key placed inside the car, hidden from view. This will be easily accessible once a locksmith has got you into the car, and you can turn off the alarm and open the trunk again. Another option is to have a spare key hidden inside a magnetic strongbox somewhere under the car. This has a few downsides.

Is the Mercedes-Benz W203 locked in the trunk?

Pelican Parts bought a 2001 C320 (W203) project car from an online auction, sight unseen and with no warranty or promises of any kind. When the car arrived one of the first things I found wrong was that the trunk would not open. I was hoping some of the missing engine accessories would be in the trunk so it was imperative that I get it open.

How can I tell if my Mercedes FOB is working?

Ensure you have new batteries in your key fob. Next, look carefully at your Mercedes-Benz key. When you press the button on your key you should see a small RED led light. The light should light up every time you press any of the buttons (Lock, Unlock, Panic, Trunk).

How to discuss a Mercedes Benz door lock problem?

Start a new thread on your specific issue. Also try using the ‘search community’ at the top of your webpage for other threads on the w202 forum and even the w210 forum. ===>>> Update your user CP info…. Did you find the recommended reading relevant to this discussion?

What to do if your Mercedes Benz FOB is not working?

Next, try taking the emergency metal key out of the fob and using it to manually unlock the car’s doors. Then check the fuses for the central locking circuit (controls the vacuum operated door locking mechanism, which uses pressure to lock all the doors at the same time), antenna module, and AAM.

Why does my Mercedes trunk not open by key fob?

Mercedes trunk will not open by key fob or interior swith 3rd brake light not working. EASY FIX!! – YouTube If playback doesn’t begin shortly, try restarting your device.

Why is the panic button on my Mercedes not working?

The panic button and/or trunk unlock features don’t work. Your problem is likely that the fob can start the car but will not allow you to unlock the vehicle’s doors or trunk. In other words, it will not allow you to use the fob as a keyless entry remote. Here are some common reasons for this issue: 1. The key is defective.

Why is the trunk on my Mercedes not opening?

I have no light on the power trunk switch (nothing happens when trying to open it) and the remote does not open it. It all started when the battery died. To make thinks worse, the key blade only goes in 1/4 of the way even after lubricating it a few times.

What to do if your trunk won’t open?

To unlock the trunk manually: while inserting the key push the lock in and turn it to the left about 1/4 turn. Key needs to remain in the lock. Try this a few times, it should release. It may also release easier if your car is unlocked… the doors that is. Hope this helps.

How to unlock the trunk of a Mercedes Benz?

Can you open the trunk on a CLK430?

HELP ok I have the CLK430 convertible 2002: I locked my ONLY set of keys in the trunk and button trunk release never worked even when I had a key. Does anyone know how I can get in the trunk to push the release? Can u remove the backseat and have access in a convertible model?

How to open the trunk without a battery?

This is the way to open the trunk without a battery. I just did it! 1) take the key off the key ring and out of the smart key. 2) make sure the end of the key is facing up when you put it into the tumbler, 3) turn the key clock wise and push in the lock and it will open! DON’T STOP TRYING IT WILL OPEN! 10 people found this helpful.

When does the car alarm go off on a Mercedes?

Mercedes alarm may go off even when no one is trying to steal the car. We have seen many cases when a Mercedes alarm (siren) goes off during the night while the car is parked, when you try to lock the car or during extremely cold weather. This past week we worked on a Mercedes-Benz where the alarm would go off randomly in the middle of the night.

Why is the steering wheel not locking on my Mercedes?

Now the steering wheel isn’t locking, windows wont work nor the radio. I called some mechanic at the Mercedes place and he said it’s the Steering Column issue is the most common issue. I’m still verifying it. 174 people found this helpful. First you need to have your key programmed.

Can you jump start a Mercedes Benz with a dead battery?

Note: Jump starting a car with a fully discharged battery will shorten the life of the battery or damage the battery. Hint: For a safer method to jump start a Mercedes-Benz with a fully discharged battery see Method 3. Method 2 Jump start your car battery with a booster pack / jump starter box.

How do you sync the remote on a Mercedes?

Instructions on how to sync Mercedes remote: Insert the key into the ignition. Quickly remove key from ignition and within 10 seconds hold down the lock button. Continue holding the lock button, and at the same time press, the unlock button five times. Next release all buttons and press the gate/trunk button one time.

What should I do if my Mercedes key fob is not working?

Why is my My2K ml430 stuck in wait mode?

My MY2K ML430 battery was replaced last night by emergency MB service. I came home to enter the radio code and now it is stuck in WAIT. I noticed on my service receipts that there are two codes listed. I want to try it again, but don’t know how to get it back to “enter the code” mode.

Where is master hydraulic lock on Mercedes E class?

1) Remove the rear seat cushion (depress levers at each end of the seat, facing the front of the vehicle, at the bottom where the seat meets the carpet, and pull seat up and out). 2) Pull the foam insulation away from the master hydraulic lock system. It is on the passenger side of the rear seat deck, behind the battery and beside the fuse bus.

How do you unlock a Mercedes E class?

This system uses air, not fluid, so it’s a piece of cake to do it. 1) Remove the rear seat cushion (depress levers at each end of the seat, facing the front of the vehicle, at the bottom where the seat meets the carpet, and pull seat up and out). 2) Pull the foam insulation away from the master hydraulic lock system.

Why is my driver’s side door lock not working?

Thanks to the good people here at Benzworld.org I was able to fix my driver’s side door lock without involving my mechanic or having to buy parts. This seems to be a huge issue with W202’s and something that many of you will also deal with. My driver’s side door lock stopped working.

How to remove remote key from Mercedes Benz W211?

1. Place remote key in EIS and turn to position 2. 2. Remove remote key from ignition lock. 3. Within 10 seconds of removing: press (close) button, hold and simultaneously press (open) button five times one after the other release pushbuttons and then press one of the two buttons once.

What is the ignition switch on a Mercedes-Benz W211?

On W211 models, the ignition switch is referred to as the electronic ignition switch (EIS). The EIS is a plastic housing with a slot for the remote key. The key has a sequential code to prevent vehicle theft.

Why is my Mercedes Benz W211 remote key not working?

Low battery voltage when starting. High A/C voltage output from battery charging. Some models with electronic steering lock (ELS) can exhibit issues similar to an EIS failure. If you have any of the following symptoms, be sure to confirm the ELS is not the issue.

What kind of battery does Mercedes Benz remote key use?

The EIS is installed in Mercedes-Benz models from C-Class to ML SUV vehicles, (W208 / W210 / W203 / W209 / W211 / W215 / W219 / W220 / W230). This article will cover replacing the battery in the black and chrome remote key, as well as some common problems and tips on faults and possible causes.

Why does my 1999 ML 320 door not open?

If all is well the alternator may be the culprit, disconnect the alternator from the + of the battery and connect the ammeter, if there is a current there then you have drain in the alternator. Did anyone ever got a solution. My 1999 ML 320 doors wont open manually. The battery is flat. Key does not turn at all. Please help.

Is there a way to manually unlock a Mercedes door?

He’s saying that if you have a trailer connector fitted, you could apply 12 V to it in order to unlock your doors without removing the wheel or using the mechanical key. Then you could simply pop the hood and charge it the normal way.

Can a Mercedes W208 CLK open with a dead battery?

Hey guys, in this video we will show you how to open jump start a Mercedes W208 CLK with a dead battery. If the battery is dead and you have not used the trunk manual lock with the key for a long time it might be impossible to open it with the key. So check out how to give it 12v supply to open the trunk and jump start the car.

How to open Mercedes trunk with dead battery and key?

How To Open Mercedes Trunk With Dead Battery And Key Doesn’t Work!!! – YouTube How To Open Mercedes Trunk With Dead Battery And Key Doesn’t Work!!! If playback doesn’t begin shortly, try restarting your device.

How do you remove the key from the ignition?

Insert the key into the ignition. Quickly remove key from ignition and within 10 seconds hold down the lock button. Continue holding the lock button, and at the same time press, the unlock button five times.

How do you program a Mercedes fob remote?

There are a few cases when you need to program your key fob remote to your Mercedes-Benz. Below you will find general instructions on how to synchronize a Mercedes key fob. For model specific instruction check your owner’s manual. Insert the key into the ignition. Quickly remove key from ignition and within 10 seconds hold down the lock button.

Can you take a Mercedes smart FOB apart?

This is a visual breakdown on how to take apart a Mercedes Benz smart Key fob, style DC12K . The parts are serviceable, but YOU MUST PERMANENTLY BREAK THE EPOXY SEAL. No worries, though. It puts back together very nicely and securely. This FOB was run over and stopped working, so the battery contacts to the board needed adjustment.

What to do if you lock your keys in your car?

Locking your keys inside of your car is frustrating, to say the least, especially if you’re in a hurry to get somewhere. You can always call AAA roadside assistance or a locksmith, but you’ll probably have to fork over some money, as well as wait for them to get to you.

Can you open the trunk if the battery is dead?

So now the battery is completely dead ! and I can’t get the trunk open to jump-start the car (battery in trunk).. I tried putting the key in the trunk lock “thing” and turning it, but it won’t open it.

What to do if your Mercedes remote is not working?

ANSWER TO NEW BATTERIES NOT WORKING in Keyless Remote: BUY the OEM Mercedes battery part number A000828038810 (MBz card-packaged item) to possibly solve remote problems!. Do NOT buy ANYTHING other than a Mercedes-Benz part number when replacing this battery.

How to program a Mercedes Benz spare key?

Follow these steps: 1. Place key in ignition lock and turn to position 2 [all ignition lights on] 2: Turn key to off position and remove from ignition. 3. Within 10 seconds: 3b: while the Close button is still depressed simultaneously press the Open [Unlock] button. Press and release the Open button 5 times [still holding the Close button down]

What kind of door lock does the Mercedes W210 use?

The W210 Mercedes was one of the last cars produced that still used the older, proven vacuum system before finally converting to electrically operated door locks.

How do you start a Mercedes Benz keyless remote?

Follow these procedures to manually start your Mercedes-Benz if the battery in the KEYLESS-GO remote has died. These instructions work for all Mercedes-Benz models that have the Start/Stop button including S-Class, C-Class, GLE-Class, ML-Class, E-Class, GL-Class, SL-Class, SLK-Class.

What to do if your Mercedes key battery dies?

Mercedes key battery has died, and you can’t start your car using the START ENGINE push button. Follow these procedures to manually start your Mercedes-Benz if the battery in the KEYLESS-GO remote has died.

How does the key work on a Mercedes Benz?

The key is powered by the inductive current when it is inserted into the ignition. This allows the key to communicate with the IR and transmit a rolling code to EIS which verifies the key and starts the engine. What to do next? Change the battery on your Mercedes-Benz keyfob as soon as possible.

What’s the start / stop button on a Mercedes?

These instructions work for all Mercedes-Benz models that have the Start/Stop button including S-Class, C-Class, GLE-Class, ML-Class, E-Class, GL-Class, SL-Class, SLK-Class. To get inside the car, remove the metal key from your Mercedes key fob.

Can a locksmith get into the trunk of a car?

A regular locksmith may be able to get into your car, but the trunk is a whole different animal. It is designed to be a safe; impossible for thieves to get into, and therefore, you as you try to break into your own car. Here’s what you need to know. Use your smartphone (hopefully you have one) to search for auto locksmiths in the area.

Can a Mercedes Benz be unlocked with a dead battery?

So if you’ve locked your keys in your car, don’t worry because Mercedes-Benz has thought of everything. Here is how to unlock your Mercedes-Benz when the battery dies. A valet key is one that it used to lock personal belongings in the glove box and trunk while your S-Class is being parked by the valet.

Where is the battery in a Mercedes Benz?

The battery is inside rear seat and the door lock are controlled by battery. You can jump the car either 1) from the battery which is in the cabin (and locked) or open the hood, there’s a positive for you, which required you to get into the cabin and open the hatch…… bummer! The only “door” i can open with the key is the trunk.

Why is the battery dead on my Mercedes?

After being away with work, the car has sat under snow & subjected to a cold climate for some time. The battery is dead, (ive checked the keyfob) and the blade key doesnt work on the drivers door or the boot. Ive read techniques on how to open the boot using the blade key, they arent working – all im doing is rotating the barrel.

How to unlock a car when the battery is dead?

Follow these 3 steps to unlock your car when the battery is dead. Remove the hidden key (Key-less entry) If your car door lock won’t turn, remove the key and check for damage or debris. Using WD40, spray into the door lock and onto the blade of the key. Work the key in and out of the lock and side to side without applying force.

Can you open the boot with a dead battery?

The battery is dead, (ive checked the keyfob) and the blade key doesnt work on the drivers door or the boot. Ive read techniques on how to open the boot using the blade key, they arent working – all im doing is rotating the barrel. Is there any other way, I can get into the car?

Why is the red light on my key fob not working?

The light should light up every time you press any of the buttons (Lock, Unlock, Panic, Trunk). Does the red LED light turn on? If the light doesn’t turn on, then you have a bad key fob remote. If the light comes on, then continue to the next step. Next, we need to check if the remote is sending out a message. The remote emits infrared waves.

How to start a new Mercedes Benz CLK-Class question?

Start a new Mercedes-Benz CLK-Class question. Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.

What kind of key does a Mercedes Benz use?

While most Mercedes-Benz cars have the SmartKey some models such as the ML Class, SLK Class, Crossfire used a metal blade key up to 2005. Some models suffer from the defective key tumbler. We have seen cars with as little as 20,000 miles where the tumbler go bad. Make sure the steering wheel is not in a locked position as mentioned above.

Why does the key not turn when inserted in the ignition?

The EIS module could also be the reason that the key does not turn when inserted in the ignition. Many car owners complain that the car starts fine on a warm or hot day but in cold days the car will not start. This may sound strange, but it is reported frequently.

How do you unlock a Mercedes with a keyless remote?

Step 1 Place your key in the car’s ignition and turn the key two clicks to the “On” position for any Mercedes car. Press and release the lock button on your Mercedes keyless remote. Press and hold the unlock button on your remote.

How do you reset a Mercedes Benz key fob?

Keep holding down the “lock” button. Release the “lock” button. This is the end of the resetting process for your Mercedes-Benz. Use your key fob to ensure it is properly working.

What happens when you close the boot on a Mercedes Benz?

If it beeps and the light flashes when you drive off it means that the roof has never completed its closing open ing procedure. What happens if you press the red roof switch to try and CLOSE the roof The other thing to try is the microswitch on the right hand side of the boot.

What happens when a car key remote is damaged?

Car key remotes operate by exchanging signals with a paired receiver. The signals that are transmitted are synonymous with a specific action being carried out. This ranges from locking the car door to starting the engine. If the car key remote transmitter is damaged, it cannot successfully interact with the car’s receiver.

Where can I buy a car key remote?

Since the car key remote is powered by a battery, it only makes sense that dead battery is one of the reasons for car remotes not working. A replacement car remote battery can be purchased from local hardware stores like Home Depot or Lowes.

What kind of battery does a CLK cab have?

Hope you guys can help with some suggestions as this is driving me mad. My wife has a 2001 CLK Cab 200k with a battery drain (somewhere!)

How can I stop battery drain on my CLK?

If so then reach under the seat and pull the 3 wire connector that powers them from both driver and passenger see if this stops the drain. The fix is either give MB a fortune for the seat controllers (which are faulty by design) or cut the permanent 12v and choc block it to the ignition controlled wire (the third is earth).

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