Question about Mercedes-Benz Cars & Trucks

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Hi.My 2001 Mercedes E320 key fob keeps setting off my car alarm. I have to take the battery out to keep it from happening. (Did change batteries thinking that was the problem) Any suggestion.....

Have a second fob that doesn't set of alarm, but recently dropped in water. Now not able to lock car. Dealer wants $380 for new fob...

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  • 240 Answers

The issue is probably due to damaged contacts on the membrane keypad or damaged tact switches within the fob. If you're comfortable doing so, open the fob to gain access to the switches or contacts. If it's a membrane style button then carefully clean the contacts on the circuit board with something like isopropyl alcohol or electrical parts cleaner. If using electrical parts cleaner, be careful not to get it on the plastic as it will likely soften, warp, and / or discolor the plastic. You're better off to spray on a cotton swab and clean the board with the swab.

If your fob uses tact switches, then you may opt to remove the switch from the board which will disable the panic feature. Or, if you have given up hope on the second fob, pull the switch from it and install that one on the otherwise working fob.

Posted on Dec 27, 2018

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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emissionwiz

Marvin

  • 85223 Answers

SOURCE: key fob will not undo

If you don't have one that works for the vehicle now, you'll have to take it to your local dealer to have it programmed to the vehicle. Some will charge for this, some will do it at no charge.

If you do have a remote that is programmed and working for the vehicle, then the following steps will allow you to program another remote:

1. Enter vehicle and close all doors.

2. Put seatbelt on (or clip it into the buckle) to shut the warning buzzer off.

3. Put key in ignition, turn to run position but don't start it.

4. Press and hold the unlock button on the working key fob and hold for 4 seconds, then also press the panic button.

5. Release both buttons and you should hear a single chime to indicate it is in program mode. You have 30 seconds after the chime to program any additional remotes you want to program.

6. Press and release both the unlock and lock buttons simultaneously on the remote you are programming. You should hear another single chime.

7. Within 4 seconds after hearing the chime, press either lock or unlock button on remote that you are programming.

Posted on Oct 16, 2008

Remontti-J

Remontti-J

  • 32 Answers

SOURCE: 2001 PT Cruiser-the electric door locks keep

The fuse is No.3 "DR locks" (near steering wheel)
If you take the fuse out the doors will not open itselves.

The root cause of the problem will be a microswitch inside the drivers door?

Check this:
http://www.ptdoityourself.net/tl/tl_index2.html#8n

Posted on May 29, 2009

Anonymous

  • 2 Answers

SOURCE: e320 car key doesn't work

I had the same problem with my 2001 E320. Roadside assistance came to my house and said it was a problem with the key. Ordered a new key (cost about $220 from Keys European in Van Nuys, CA) and the key worked. When I went to dealer to pick up the key, I spoke to a service consultant and he said that hes seen that problem before and replacing the key wont do anything (even though it did work). He said something about a ESI (something like that) and said that parts only on that cost about $600. So first thing you should try is replacing your key. Hope I helped.

Posted on Nov 01, 2009

barry corrin

  • 510 Answers

SOURCE: I have a mercedes 2004 ml270 and the central

Synchronization
Turn ignition switch to position II. Turn ignition switch to position 0 and remove key. Within 1 minute: Press and hold key lock button. Press unlock button 5 times. Remote control should now operate system. If not: Repeat procedure.
Programming
When
Key remote control added or replaced. System malfunction.
How
Keys can only be programmed using diagnostic equipment.

Posted on Feb 14, 2010

Testimonial: "Spot on work great thanks."

roniecon

Ronny Bennett Sr.

  • 6927 Answers

SOURCE: how do you re-link the key fob to the car after

Try this,,turn the key on ,wait 10 minutes,then turn the key off,then right back on,do this three times,a total of 30 minutes,this should reset the key fob,if this is the problem.

Posted on Apr 17, 2010

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