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I have a 2001 c320 and my key won't unlock or lock the doors. Once I get in the car I put the key in the ignition and nothing happens. If I insert the key in the ignition and out multiple time the key will turn and start the car. Now that it's cold I cannot get the key to turn at all. The car battery is good and also in the remote. Could it be the rear Sam?

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  • 107 Answers

Mercedes ! so your locks probably got some liquid oil something in them by some clever guy trying to fix it, bad move, get yourself some graphite. just a small bottle, with a SMALL opening don't cut it off just poke it. small hole! it is a metal powder that if you get it on your clothes it stains, so with a old towel in your lap, put a bit of graphite on your key and rub it all over, then blow a little with the bottle nozzle into the key hole just once, then start moving the key in and out slowly, it will get easier , add a little more powder then start on turning the key . work your way through all the locks like this . should fix all of them and make other stuff start coming on again. too much of this stuff wont hurt it but does sort of clog it with the greasy stuff in there, take your time.

Posted on Nov 16, 2014

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Posted on Jan 02, 2017

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SOURCE: c240 mercedes key wont turn seems locked

I have a 2001 C240 with the same issue. I removed the positive battery cable from the battery and kept it off for 30 seconds then replaced it. Everything was reset and the key worked.

Posted on Feb 10, 2010

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Vehicle entry problem


THAT really sounds like someone is pranking you by swapping your car for another car just like it.

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Adding key.
Note:
You must be having one working master key to perform this function.
1. Start with the key out of the ignition, drivers door is open all others closed and drivers door is unlocked.
2. Perform these steps within 5 seconds.
A. Insert the key into the ignition(Do NOT Turn) Pull key out.
B. Insert the key into the ignition(Do NOT Turn) Pull key out.
3. Perform these steps within 40 seconds.
A. Close then open the drivers door.
B. Close then open the drivers door.
C. Insert the key into the ignition(Do NOT Turn) Pull key out.
4. Perform these steps within 40 seconds.
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B. Close then open the drivers door.
C. Insert the key into ignition and leave it in ignition.
D. Close the drivers door.
E. Turn the ignition to ON (Do NOT Start) then back to OFF.
F. Remove the key from the ignition.
5. Within 3 seconds, the power door locks should lock then unlock automatically indicating successful entry into programming mode.
Return to step 1 if the locks do not cycle at this point.
6. Perform these steps within 40 seconds.
A. Press the lock and unlock buttons on the remtoe simutaneously for 1.5 seconds.
B. Immediately after letting go of the lock and unlock buttons,
Press the lock button by itself and hold for 2 seconds. Within 3 seconds, the door locks should lock and then unlock once indicating successful programming. If the door locks cycle twice, repeat steps A and B in step 6 as the remote was not accepted.
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Programming
When
Key added or replaced. System malfunction.
How
Driver's door open and key removed from ignition switch. Insert key into ignition switch, then remove it. Within 5 seconds: Insert key into ignition switch, then remove it. Within 40 seconds: Close and open driver's door twice. Insert key into ignition switch, then remove it. Within 40 seconds: Close and open driver's door twice. Insert key into ignition switch. Close driver's door. Switch ignition ON and OFF once to program a new key code whilst retaining the original codes or twice to program a new key code whilst erasing the original codes. Remove key. System should now lock and unlock vehicle, once or twice depending which mode has been selected. Carry out the following button procedure within 40 seconds: Press key lock or unlock button once. Within 3 seconds: Press same key lock or unlock button once. System should now lock and unlock vehicle.
NOTE: If system locks and unlocks vehicle twice, programming procedure has not been completed. Repeat button procedure.
If required repeat button procedure to program remaining keys.
NOTE: To exit programming mode: Open driver's door. NOTE: A maximum of 4 keys can be programmed

This will work providing printed circuit is not damaged in remote

Jul 20, 2010 | 2004 Toyota Camry

1 Answer

Program remote


The horn chirp can be disable by pressing the lock and unlock buttons simultaneously until the hazard lights flash, and no enable press the lock and unlock until the horn chirp.
To reprogram (enter new ID) key fob (keyless remote controller) follow the steps.
1. Close all doors and lock all doors
2. Insert and remove the key from the ignition key cylinder more than six times within 10 seconds. (The hazard warning lamp will then flash.) NOTE: Key should be withdrawn from ignition key cylinder completely each time.
NOTE: Do not rush the insertion/removal key cycling process. The side marker/tail/license lamps and interior illumination will flash twice when this step is accurately completed.
3. Insert key on ignition key cylinder and turn ignition key switch to "AAC" position At this time, the new ID code is entered and original (previous) ID codes are erase.
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NOTE: Do not press the button more than one time in the above step. If the button is pressed more than one time, the programming procedure will not be successful. The side marker/tail/license lamps and interior illumination will flash twice when this step is accurately completed and programming is successful.
If there is only one remote controller skip step 5.
5. Additional ID code entry Release the door lock, then lock again with door lock/unlock switch (In power window main switch)
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Feb 20, 2010 | 2001 Nissan Pathfinder

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Fuse box location & chart 2001 Mercedes c320/Key wont turn


There is a fuse to protect the circut operating the electric steering lock.

Apr 01, 2009 | 2001 Mercedes-Benz C-Class

1 Answer

Program my remote


Program your factory keyless entry functions
For 2001+ Tacomas equipped with a factory alarm or keyless entrymag-glass_10x10.gif, here are some programming options that allow you to adjust the way your locks work.
The first programming option allows you to set the entry unlock to: (A) unlock the driver door with one push, and the remaining doors with a second push OR (B) unlock all of the doors with a single push.
  • Open the driver's door. Remove the key from the ignition switch.
  • (Complete these steps within 40 seconds)
    1. Insert the key into and remove it from the ignition switch 2 times.
      (IN - OUT - IN - OUT)
    2. Close, then open the driver's door 2 times.
      (SHUT - OPEN - SHUT - OPEN)
    3. Insert the key into and remove it from the ignition switch 1 time.
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    4. Close, then open the driver's door 2 times.
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    5. Insert the key into the ignition switch and leave it in.
    6. Close the driver's door.
    7. Turn the key from LOCK to ON 4 times, ending at LOCK
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    8. Wait for the locks to stop, then remove the key from the ignition switch.
  • On the key fob, press and release both LOCK and UNLOCK buttons at the same time.
    1. [For all doors unlock] press and release the UNLOCK button.
    2. [For driver door unlock] press and release the LOCK button.
  • Open the driver's door. The programming is complete. If programming did not occur, start over.

Jan 13, 2009 | 2001 Toyota Tacoma

1 Answer

I put my key in the ignition, and nothing happens at all. The key does not turn even a fraction. I have a 2001 C320 Mercedes


There's a good chance the key is worn or the ignition lock. If you don't have another key you can order one through a Merc dealer via the chassis number.

Cheers John

Dec 22, 2008 | 2001 Mercedes-Benz C-Class

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