How do you change the key on a Mercedes Benz?

1.Turn the key to the second position in the ignition. Now turn the key to the first position in the ignition & remove. 2. You now have a 60 second window where you must press & hold the LOCK button. 3. While holding down the LOCK button, press the UNLOCK button five times.

What to do if your Mercedes ignition switch is not working?

If you have a spare key try to see if you are experiencing the same symptoms with the other key. If the other key works, keep using it for a couple of weeks to verify that the issue is really the key and not the EIS. Try scanning your Mercedes-Benz for fault codes. Ideally using a Start Diagnostic Scanner.

Why does my Mercedes Benz not turn on?

A problem that Mercedes-Benz owners may face is the key no longer turns in the ignition. This issue is often caused either by a defective key, bad shifter module, a failed Electronic Ignition Switch (EIS) also known as the EIS-EZS or a bad steering lock module (ESL).

Why is my Mercedes EZs EIS ignition not working?

The only issue here is that if you can’t turn on the ignition, you can’t power on the OBD2 port and the iCarsoft MB II scanner. If the ignition turns on intermittently, consider yourself lucky and scan for codes. Hopefully, there are fault codes that will point you to the problem. Diagnosing Mercedes ignition problems isn’t a simple DIY job.

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.

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.

Why does my Mercedes Benz refuse to start?

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. When you least expect it, running late on your way to a special event, you try turning the key again.

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).

Is there limit to number of Mercedes keys?

Mercedes were one of the first cars to introduce serious built in security into their cars and over time they have built up an incredibly secure system. Sometimes this amazing security means that the dealership is going to be your only option for a new set of keys. The Smart key actually has limits to how many keys can be coded to each car.

What to do if your Mercedes smart key battery is dead?

Next, remove the Start / Stop button from the ignition lock. You can quickly pull it from the ignition. The Start/Stop button will pop out. Insert your smart key into the ignition. It is ok if the smart key battery is dead. Press the brake pedal and make sure the transmission is in Park position.

How do you start a Mercedes Benz key fob?

Turn the KEYLESS-GO key in the ignition to start the engine. Release the key as soon as the engine cranks. Make sure to save the Engine Start/Stop button so that you can reinsert it once you change the battery in your Mercedes key fob.

Do you need a new Mercedes Benz key?

If you own a newer Mercedes-Benz, you don’t need the old keys to order a new Mercedes key. Just follow the instruction below on how to order a new Mercedes key. We have learned that Mercedes-Benz no longer makes replacement keys for older models.

What to do if your Mercedes key dies?

If you have a Mercedes-Benz with KEYLESS-GO, you may be wondering how to start the car if the battery in the key dies. Pressing the Engine Start/Stop button does nothing of course if your key fob battery has died. Mercedes key battery has died, and you can’t start your car using the START ENGINE push button.

How do you change the battery on a Mercedes?

Instructions on how to change the battery on any Mercedes-Benz key fob can be found here: No programming is required after you replace the key battery. Insert the key in the ignition to start the car once, and the key should function properly including the door lock/unlock feature.

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.

How to program a new Mercedes Benz fob / remote?

Programming A New Spare Key Fob/remote 1 Place transmitter key in ignition lock and turn to position 2 2 Extract transmitter key from ignition lock 3 Within 10 seconds:

How do you program a Mercedes-Benz C220 key?

For the button to work with the car, you need to tell the car that this is it’s key now. You need to synchronize it with the car. Place the key into the ignition, turn the key to position 2 while holding the button. The green light on the mirror should start flashing.

Where can I get a new ignition key?

Order a replacement ignition key from a locksmith. It generally takes a few hours for the locksmith to check your ignition against the keys they have in stock and find the right one, as well as cut down and form the right size and shape of key for your car. Check the new key by inserting it into the ignition.

What to do if your ignition key doesn’t work?

Check the new key by inserting it into the ignition. If the car starts right away, you’re all set. However, if the key doesn’t work, then you’ll need to visit your dealer. This indicates the key requires programming. Take your new key to a factory dealer, preferably one who sells your make and model.

Do you need to synchronize new Mercedes Benz key?

Mercedes Benz says that they need to synchronize the new key to the car. You can easily do that yourself. The key comes pre-programmed to your car and it will start it without any further programming. The synchronization is more for the doors, windows, unlock function.

How do you lock the ignition switch on a Mercedes SLK?

Alternately, it can be pried off carefully using a small flatblade screwdriver. For reassembly, the ring’s clips (arrow) grab the slot in the dash panel directly under the key cylinder. The special Lock Cover Tool catches the key’s remote fob, causing the key to move with the tool.

How to reinstall a Mercedes Benz ignition switch?

For reinstallation, begin with the flat edge in the 9:00 position and then spin it to 12:00 using the tool. The key remains in the “1” position, retracting the cylinder’s spring-loaded pins. This allows the cylinder to be pulled out of the steering lock.

How much does it cost to get a new Mercedes Benz key?

In some cases, new keys may cost up to $560, as reported by Mercedes-Benz owners. Wait 3 to 4 days for the key to be shipped to your dealership. Keys are made in USA in some cases they have to be shipped from Germany in which case you may have to wait up to 10 days. All the required documents as if you were the owner of the car plus you will need:

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