Why is my Mercedes C class key not working?

The main symptoms are the key won’t unlock the doors or start the car. You may see a blinking red light when you press a button. Insert the key and turn it to the “ON” position, then press and release the lock button on the key. Press and hold the remote’s unlock button.

What should I do if my Mercedes key 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. The light should light up every time you press any of the buttons (Lock, Unlock, Panic, Trunk).

How do you unlock a Mercedes C class?

Insert the key and turn it to the “ON” position, then press and release the lock button on the key. Press and hold the remote’s unlock button. In 1-2 seconds, press the remote’s lock button five times in a row while holding the unlock button.

What does the fob remote on a Mercedes Benz do?

The newer keys have a transponder integrated in them. The key fob remote serves two purposes. First it disables the anti-theft system when you unlock the car. Second, Drive Authorization System verifies the key to make sure it is the right key to start the car.

What kind of car is the Mercedes cls550?

A: The Mercedes-Benz CLS550 is a luxury large car that is capable of seating up to four passengers. Q: What class is a Mercedes 550? A: The Mercedes-Benz CLS550 is a luxury large car. In addition to a generous list of standard features, the 2015-2016 Mercedes-Benz CLS550 also comes with numerous available packages.

What does CLS stand for in Mercedes Benz?

A: In Mercedes vehicles, “CLS” stands for “Coupé Leicht Sport”, with “Leicht” meaning “light” in German. Q: Is there a CLS 550 AMG? A: No, the Mercedes-Benz CLS550 does not come available as an AMG model.

How often does a Mercedes Benz cls550 need to be repaired?

Frequency According to RepairPal, Mercedes-Benz CLS550 owners bring their vehicles into a repair shop for unscheduled repairs an average of 0.7 times per year, compared to an average of 0.8 times for luxury fullsize cars and 0.5 times for all the vehicle models RepairPal considered in its dataset.

Why is my key fob not working on my Chrysler 200?

If the battery in your fob is low you are supposed to be able to press the fob against the dash near the start button to get it close enough to have the push button start work. If that does the trick, I’ll bet the fob batteries were low. Maybe the commands to unlock doors and remote start take less juice than the hands free proximity signal?

Why is the boot on my Mercedes C200 not opening?

The boot on my c200 (1999) just won’t open. It opened this morning, but not tonight and I’ve tried a few things – namely the key fob button, the dashboard console button and then the key. I’m not hearing the usual whirr noise ad the key simply won’t move left or right in the lock.

How do you unlock the Mercedes C class key fob?

Why is my key fob not working on my Mercedes?

If neither of your key fobs unlocks or starts the car, there’s a good chance that the issue is the car’s battery. Some owners report that their cars failed to start even after a jump start, but a later trip to the dealership indicated a dead car battery.

What should I do if my car won’t detect the key fob?

Look for a hidden slot near the steering column that might not be obvious at first. Press the start button with the key itself. Some cars can still detect dead key fobs this way in emergencies. If it’s a cold day, go indoors and warm up the key fob with your breath.

Why is my car key not working when I unlock my car?

If your car key is not working when you attempt to unlock your car, there is a possibility that the lock itself is damaged. If you drive a fairly modern car, there is less of chance that you will have to deal with this, which is mostly attributed to the presence of key fobs and keyless entry remotes.

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

Why is my key fob on my W204 not working?

Here’s a look at some common reasons why your w204’s key fob isn’t working. Some owners report an error message, such as “key not detected,” or limited range when the key batteries are dead or very low. Fortunately, changing the key battery is simple and can be accomplished by using the valet key that comes included with the fob.

Why does my car key not work after I change the battery?

If your key does not work after you change the car battery, start the engine by pressing the START button with the keyfob. If your key does not work after changing the key fob battery, here are some possible causes. Don’t touch the key fob circuit. Avoid touching the key fob circuit with your bare hands.

What should I do if my car key won’t work?

What to do if your smart key is not working?

If your SmartKey isn’t working, you might need to re-sync it. The main symptoms are the key won’t unlock the doors or start the car. You may see a blinking red light when you press a button. Insert the key and turn it to the “ON” position, then press and release the lock button on the key.

What does it mean when your car won’t start when you turn the key?

If you hear a clicking sound, this often means the electrical components are not working. However, if there is no sound at all, and especially if you see the dashboard lights or dials come on when you turn the key, this often means the engine simply won’t even try to start since it’s not getting that needed signal from the key.

Why does my car ignition not start up?

There may be a few reasons why the ignition won’t start the car. Some of them are mechanical (such as a dead battery) and some of them are transponder key related issues. Ignition Cylinder and Car Keys.

What to do if your Mercedes key won’t turn?

If you have this problem you will have to install a new / virgin EIS. You can not install a used unit because the EIS has to be paired / married to the car using Mercedes-Benz Star Diagnostic Software. They key itself may be the reason why the car doesn’t start. The key may open the doors, but it will not start the car.

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.

Why is my ignition not working on my Mercedes Benz?

It is possible that the battery in the car is defective, as it does not provide the necessary voltage for the ECU and the N73 Electronic Ignition/Starter Switch (EIS) to function properly. If the battery is dead or has low voltage / under voltage, the CAN communication between EIS and N72 may not function properly.

Why does my car not start in the Cold?

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. The EIS has processors soldered on the circuit board and in many cases the connections for the processor could be bad or the processor itself is defective.

How do you unlock a car with Keyless Go?

The key would unlock the car via keyfob and start it by inserting the key in the ignition. But Keyless Go stopped working. Push Start or unlocking the car by pressing driver’s door handle stopped working. If you pressed the unlock button on the door handle the instrument cluster would state “Key not recognized”.

Why is the push start on my Mercedes not working?

The problem started with the Keyless Go feature. The key would unlock the car via keyfob and start it by inserting the key in the ignition. But Keyless Go stopped working. Push Start or unlocking the car by pressing driver’s door handle stopped working.

Why is my go key not working on my Mercedes?

Many owners with this problem report that the ignition light will illuminate, but the car won’t start. In order for it to fully transmit the signal, the card needs to be in close proximity like in the front pocket of a shirt, and not in a laptop bag. Figure 2. Check the range of the keyless Go keys.

Is the key fob on my SL500 not working?

My 2003 SL500 has Keyless Go (Key fob). The touch sensor on the drivers door was intermittent for about a month and has now stopped working. The passenger door touch sensor was working fine but has also stopped working. The doors unlock if I pull the handle gently.

What to do if your Ford keyless entry is not working?

Turn the ignition switch from the OFF position to the RUN position eight times within 10 seconds with the last position being RUN. All of the door locks will cycle. This confirms that you are entering the programming mode. Press 7,8,9 and 0 buttons simultaneously on the keypad. This sends a lock signal. Turn the ignition to OFF.

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

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 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.

How does the lock work on a Mercedes Benz?

It’s a mechanical action, more of a squeeze than a pull as it has to shift the lock mechanism. Not sure exactly how it works but it’s like the first pull engages the mechanism and the second one lifts the lock. Both done after the key has been turned (i.e. don’t turn the key and pull the handle at the same time, just turn the key and leave it).

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

You will have to purchase this (Foxwell, iCarsoft, and Bluedriver models are all recommended for Mercedes Benz), or you can ask a mechanic if you’re not comfortable doing this yourself. To use a diagnostic scanner, turn your car’s engine off and plug the scanner into the diagnostic link connector under the dashboard.

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 to fix a car that won’t start when you turn the key?

How to fix car that wont crank when you turn the key, no sound or click. How to jump start a car, check the starter, and wire bypass trick. DIY car repair with Scotty Kilmer, an auto mechanic for the last 50 years. Thanks for watching! 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2. Cheap Scan Tool: https://amzn.to/2D8Tvae 3.

Do you need to reset the key on a Mercedes?

Imagine attempting to find the door lock on your Mercedes on a dark, rainy night with your arms full of groceries. That key fob’s lock and unlock button is beneficial to have in such situations. If you obtain a new key for your Mercedes, the key will need to be programmed, or reset, to work with your particular vehicle.

Why is my car key not working on my car?

However, if this is the case, your key should still be able to start the car. Your key won’t unlock the car, and won’t start the car. It could be the car battery. If the car battery is dead, the key’s remote won’t be able to communicate wirelessly with the car at all.

How can I trust these reviews about Mercedes C320?

See reviews below to learn more or submit your own review. The Mercedes C-class coupes are luxury vehicles. Read more Mercedes-Benz reviews to learn about other models. Time for a new car and not sure where to start? Search local inventory today! How do I know I can trust these reviews about Mercedes c320?

What to do if you lost your Mercedes Benz key?

If you lost a key and you are worried that it is in the wrong hands, you can take your car to the dealer and they can disable the lost key. Mercedes Benz says that they need to synchronize the new key to the car.

Why does my Mercedes not start when I turn the key?

Despite this brand’s high quality, though, Mercedes’ can develop problems with or without regular car maintenance. There are a few theories about why your Mercedes refuses to start when you switch the key in the ignition. It is infuriating to slide behind the wheel, turn the key, see dash lights blink, but the engine won’t turn over.

What’s the best way to turn the key in a car?

Push the steering wheel in the direction that allows a little movement and then insert the key and try to turn the key again. You can put pressure on the steering wheel and also try shaking the steering wheel. As you do this insert the key into the ignition and try to turn the key. DO NOT TRY TO FORCE THE KEY IN THE IGNITION.

Why is my car key fob not working?

You go to start your car one day, but you get no response from your vehicle. Your first thought might be a dead car battery, which can sometimes cause the key fob to stop working. Before you call the tow truck, however, it’s important to consider other reasons why your key fob might not be working.

What does it mean when your ignition key won’t turn?

The key (electronic key); 2. The electronic ignition switch (eis, the place where you put your key in); 3. steering locker; 4 the central electronic circuit module. If only one of them has a problem, the key will refuse to turn.

Where is the ignition key on a Mercedes Benz?

There are 4 electronic and/or mechanical modules that are synchronized for everything to work ok: 1. The key (electronic key); 2. The electronic ignition switch (eis, the place where you put your key in); 3. steering locker; 4 the central electronic circuit module.

What causes a Mercedes Benz key to not turn?

List of common problems and possible solutions 1 Locked Steering Wheel. New drivers always experience this at least once, so we thought we would include it in this list. 2 Discharged Battery Undervoltage. 3 Key Tumbler Defective. 4 Defective Electronic Ignition/Switch System EIS / N73. 5 Smart Key Remote.

What kind of car won’t turn ignition key?

It is a C230 1998. I sometimes have a similar thing happen with my ’97 C200, but in my case when I insert the key nothing happens, steering lock doesn’t disengage or anything. If I stick my finger into the ignition slot and give it a wipe then all seems OK, but after this happens the engine starts for only a second before quitting.

Why is my Mercedes Benz go card not working?

The Mercedes-Benz keyless Go card can cause a no-start situation if the signal is weak or blocked. Many owners with this problem report that the ignition light will illuminate, but the car won’t start. In order for it to fully transmit the signal, the card needs to be in close proximity like in the front pocket of a shirt, and not in a laptop bag.

Why does my car not start with the key?

Opened it with the key manually, and the car started up fine. Didn’t think anything of it…just thought key fob battery was dead. This morning, again I unlocked the door manually with the key, but this time the car wouldn’t start.

What to do if your car key won’t unlock?

If the driver cannot arm the car, find another parking space. Some anti-theft systems are equipped with automatic activation. In this case, you must bring the key fob as close as possible to the antenna module to switch off the signaling.

Why is my Mercedes Benz C300 not starting?

Tried turning the car on using the spare key. If the battery on your main remote key is low it can be the root cause for the car not starting (per local mechanic). Visually inspected all fuses and looked for a blown fuse, none found.

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.

How to fix a car key button that won’t unlock the door?

How to fix a car key button that won’t lock and unlock the door. – YouTube How to fix a car key button that won’t lock and unlock the door. If playback doesn’t begin shortly, try restarting your device.

Is there a problem with my Mercedes-Benz C220 CDI?

Hy Have same problem c220 Cdi 2002 auto car sometimes starts but sometimes I put key in and nothing happens no noise no crank nothing and I have to hold the key in start position for 5 min then car starts.got it tested and I’ve been told the ecu doesent correspond with starter sometimes!

What does a Mercedes C class steering lock do?

The Mercedes-Benz C-Class is equipped with many electronic components, and one of those is the steering lock module. What the steering lock does is it recognizes the key in the ignition, it decodes the safety parameters of the key, and then once it approves the key, it allows for the engine to crank over, so you can be on your way.

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 kind of battery do Mercedes key remotes use?

There are several Mercedes Smart Key remotes so make sure to look at the correct video. We strongly recommend using a Lithium battery like these one s, as they last much longer.

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 much does it cost to replace a Mercedes ignition key?

Prior to the failure, they exhibited the same symptoms as your video shows. Mercedes will sell you 1 new chrome FOB for about $220. It has to come from them and you will have to show proof of ownership before they will sell it. If neither of those steps solves it, then you are looking possibly at the key receiver, a more expensive proposition.

Why does my car key not turn in?

A very common reason a car key won’t turn in the ignition is that the keyway of the ignition cylinder is a little jammed up. Just lubricating the lock may be enough to solve your issue.

Why is my Mercedes-Benz C240 key not turning?

What are common reasons my Mercedes-Benz C240 key won’t turn? While there are a variety of reasons your Mercedes-Benz C240 key won’t turn, the most common 3 are a binding steering column/lock, an ignition switch issue, or a problem with the ignition key.

A very common reason a car key won’t turn in the ignition is that the keyway of the ignition cylinder is a little jammed up. Just lubricating the lock may be enough to solve your issue.

Why is the battery on my Mercedes Benz not working?

Hint: Starter Problem or Low Battery This may seem obvious, but an old battery is the root of many headaches and can cause all sorts of malfunctions on Mercedes-Benz cars. How old is the battery on your Mercedes-Benz?

What should I do if my Mercedes Benz won’t start?

Start the car and you should be able to get around 60 psi. When the engine is running and when you turn off the engine the pressure should stay steady. Always perform this test on a cold engine. Next, make sure that the fuel injector connections are secure and not loose. Check the fuel pump and the fuel pump relay.

How does the remote key work on a Mercedes C class?

Press the remote button just once. NOTE: For vehicles model year up to 12-93 – lock or unlock car with the remote key flip out blade within 30 seconds in door lock Mercedes C class models from Jan 1994 with control modules 202 820 40, 26 and 202 820 43 26. Turn on ignition to position 2 with folding key within next 30 seconds.

What to do if your Mercedes key is stuck?

This video shows how to fix the problem when your Mercedes key is stuck and won’t turn in the ignition. The video is specific to the W202 chassis (C-Series 1994-1997, C220, C280, etc), but a similar approach to the repair can be applied to other (older) Mercedes vehicles with mechanical locks. Loading…

What to do if the key does not turn in the ignition?

If the key does not turn in the ignition, try moving the steering wheel as you try to turn the key. The steering wheel will feel completely solid if you try to move it in one direction and may move slightly in the opposite direction.

How can I tell if my Mercedes remote is working?

Next, we need to check if the remote is sending out a message. The remote emits infrared waves. While you can’t see infrared light with your eyes, there is an easy way to check. Grab your phone and turn on the camera. Point the camera to your phone and carefully see if you notice a light every time you turn you press a button on the remote.

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.

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.

How can I tell if my key fob remote is bad?

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). Does the red LED light turn on? If the light doesn’t turn on, then you have a bad key fob remote.

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.

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.

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.

Where is the central locking system on a Mercedes?

The locks are vacuum operated. The pump is next to the battery under rear seat. Do you hear the pump starting when you press the remote, or dash button? 1994 E320 Wagon,1999 E320 Wagon,2000 E 320 Wagon, MGB Track/Rally, ,1988 300E ,more…. Resolved his problem.

Where do you listen when your car is not started?

While one of your friends turn the key to position II, all dash lights on but car is not started; listen carefully at these locations. Under or behind the rear seat, listen inside the trunk near the back of the back seat, listen through the fuel fill with the fuel cap removed.

Why did my Mercedes-Benz C320 2001 break down?

My c320 2001 with 97k broke down. On Saturday i jumped in to the car as usual started the engine and brake faults appeared. I was suprised and switched engine off for restart having hope it will disappear.

Why is my C320 no crank and electric issues?

P2037 no or incorrect CAN message from control unit N15/3 ETC (EGS) communication fault. I was advised to check maxi fuses and front SAM fuses 52 53 54 and starter relay. All is fine and also i replaced all maxi fused. Only 60a yellow (position f6) looked overburned.

Why is my Mercedes C320 C class not turning?

I have a 2001 Mercedes c320 c-class. The ignition key won’t turn, the lights don’t turn on and I have use the metal key to unlock the door.Everything was working fine until today. Anyone know what could be wrong? It’s probably a dead vehicle battery.

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