LAGUNA II RF RESYNCHRONISING
1. Turn Ignition OFF.
2. Press the central door locking button for more than 5 seconds. Note: the door should lock then unlock.
3. When this happens, 15 seconds is allowed and the immobilizer warning light illuminates.
4. Press the remote control once, the doors should lock and unlock.
5. Press the second remote control once, the doors should lock and unlock.
6. Check the remote control unlocks and locks the doors.
LAGUNA II RF RESYNCHRONISING
1. Turn Ignition OFF.
2. Press the central door locking button for more than 5 seconds. Note: the door should lock then unlock.
3. When this happens, 15 seconds is allowed and the immobilizer warning light illuminates.
4. Press the remote control once, the doors should lock and unlock.
5. Press the second remote control once, the doors should lock and unlock.
6. Check the remote control unlocks and locks the doors.
check the battery in the car and the batteries for the fob key
To reset a 2006 Mercedes C-Class key fob, first, insert the key into the ignition and turn it to the “On” position without starting the engine. Press the “Unlock” button on the key fob for about 5 seconds, then release it. Turn the key back to the “Off” position, remove it, and then test the key fob to see if it functions properly. If it still doesn't work, you may need to replace the battery or reprogram the fob.
how to reset remote key fob for Mercedes SL 320
C200 key fob problem
The most probable cause is the battery is exhausted.
No
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.
How do you program a key fob to a 2003 Chevy Malibu
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.
On the C280, the trunk is electro-mechanical. It should open either with the key fob, or with the "valet" key that slides out of the fob. The C-Class Mercedes' still have the traditional exterior keyhole. Also, on the C-Class, there is a switch on the center console between the seats that opens the trunk.
To program any kind of key fob you have to take it to a dealership.
Weak battery in fob?