C200 key fob problem
how to reset remote key fob for Mercedes SL 320
No
There is not a way to unlock a 2010 C200 Mercedes trunk without the key unless the back seat is taken out. You can call a locksmith or your triple A service.
Put the key in the ignition and turn the key 2 clicks to the On position and press and release the lock button on the fob. Then press and hold the unlock button on the fob 5 times and then release. This will reset the fob for your Mercedes.
Weak battery in fob?
To replace the battery on a Mercedes ml 350 key fob it is probably best to ask the supplier where it is purchased or there may be some instructions online.
check the battery in the car and the batteries for the fob key
get a new one :I lol
Do you have the "valet key" (black FOB key with the auto-lock & 'panic' buttons are)? We had this problem with our '98 E320 and it turned out the battery in the valet key needed replacing.
Take the metal key out of the fob and use it to press the button inside the key fob. That should release both side and enable you to open the key fob to change the batteries
To reprogram the key fob for a 2002 Mercedes, first, ensure you have all the keys you want to program. Insert the key into the ignition and turn it to the "On" position without starting the engine. Press and hold the "Lock" button on the key fob for about 5 seconds, then release it. Turn the ignition off and remove the key; the fob should now be reprogrammed. If you have multiple fobs, repeat the process for each one.
The key fob doesn't get reset... the keyless entry module gets programmed to accept commands from that key fob. If your key fob suddenly stops working and it's not a battery issue, then you either have a problem with your key fob itself, or the keyless entry module, and it'll need to be diagnosed and repaired accordingly.