Question about 2010 Mercedes-Benz C-Class
When key is pressed the red light is coming on but not flashing well. And when the appropriate key is pressed, it is not locking or unlocking the car, what could be done to the key? I replaced the battery but no change....not sure any problem with the car, I don't have a spare key!!
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Posted on Jan 02, 2017
SOURCE: mercedes 1999 c200 key fob
Could it be the key just needs re-coding? maybe you are worrying to much as £177 would be about right as that would need coding etc., Try phoning your local Merc dealer or take the key and V5 to them for coding (Hopefully)
Posted on Jan 06, 2009
SOURCE: Hi, My cars central locking
Replace Fuse 27 in main fuse box located under the hood black box in far right corner. Then try reseting your battery. Make sure to follow these steps as follow. Unhook the - then + of the battery. Clean both the negative and postive of the battery. Next go under the hood far right and replace Fuse 27 which is 15 type fuse green in color. Wait 20 minutes for reset of the computer then attach the + and - cables back to the battery.
Posted on Jun 06, 2011
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Battery Constant 12v+ Positive Wire (+): Black/Yellow
Battery Constant 12v+ Positive Wire Location: Ignition Switch Harness
Starter Positive Wire (+): Blue/Red
Starter Positive Wire Location: Ignition Switch Harness
Ignition Positive Wire (+): Red
Ignition Positive Wire Location: Ignition Switch Harness
Accessory Positive Wire (+): Red/Yellow
Accessory Positive Wire Location: Ignition Switch Harness
Parking Light Positive Wire (+): Red
Parking Light Positive Wire Location: Low In Drivers Kick Panel
Power Door Lock Negative Wire (-): Add Actuator. This vehicle uses a central door locking system. When connecting a keyless entry, you will need to add a door lock actuator and some units will also require (2) extra relays.
Power Door Lock Negative Wire Location: To Drivers Door Only
Power Door Unlock Negative Wire (-): Add Actuator. This vehicle uses a central door locking system. When connecting a keyless entry, you will need to add a door lock actuator and some units will also require (2) extra relays.
Power Door Unlock Negative Wire Location: To Drivers Door Only
Door Trigger Negative Wire (-): Red/White
Door Trigger Negative Wire Location: In Black Plug, Above Hood Release
Domelight Supervision Wire: Use Door Trigger, Requires Relay
Domelight Supervision Wire Location: N/A
Horn Negative Wire (-): Red/Green
Horn Negative Wire Location: At Steering Column Harness
Tachometer Wire Negative Wire (-): Black/Blue
Tachometer Wire Negative Wire Location: At ECM, Under Drivers Side Dash
Brake Light Positive Wire (+): White/Black
Brake Light Positive Wire Location: At Switch Above Brake Pedal
CODE ALARM SYSTEM
Lock: Left button will lock all doors. Double chirp indicates locked.
Unlock: Right button will unlock driver's door only. Hold unlock button app 6 seconds, it will unlock all doors including rear gate. Single chirp indicated unlock.
If the car chirps or lights flash 4x the alarm was triggered.
Panic. Press both buttons to activate emergency honk and flashing lights.
Valet mode: With optional alarm onlyPress the red alarm button on the left of the steering wheel. The light will quickly double flash. To re-set back to normal mode, press the red alarm light button again
Battery failed and lights flashing?
Parking lights will flash when the vehicle's battery is disconnected and reconnected.
To stop lights from flashing, either:
Press remote transmitter "UNLOCK" button once OR turn the ignition switch to the "ON" position and press programming button for one second (see below).
The vehicle interior (courtesy) light and door open warning light (DOOR AJAR indicator) will then illuminate for 60 seconds when the ignition is turned off, or until the doors are locked with the remote transmitter. Yes, the dashboard instrument panel lights will flash when the parking lights flash.
Programming or Overriding the Alarm when you have lost the remote
Open driver's door.
Turn ignition key to 'On'
Press and *hold programming button* in (see diagram, button under dashboard)
After 15 seconds the the door locks will cycle 3 times. Do not release Programming button.
Press lock (left) button the remotes to be programmed. The door locks will cycle one time. Exit programming mode by releasing Programming button under dashboard and turning key to off.
Code Alarm Programming Button is under dashboard on the kick panel by the driver's left knee, left of the steering column. If you can't find it, it might still be tucked up in the wiring harness higher up in that same general area. The botton is recessed in a plastic ring (see diagram).
This button must be pressed while programming remotes or if the battery was disconnected and the lights are flashing.
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