I have replaced my car's battery and now suddenly the central locking is not working

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Profile picture for user Daniel Colchado Rodriguez

did you replace with the same kind of battery? MB are very sensitive to it. i.e. yours use 60-67Ah, 530-570Amps, the best you can do is to search online and compare the battery you bought with the recommended for your car, if it doesn't fits go to your seller and claim for an exchange or refund.

a battery that doesn't fits in requirements to MB could ends on a lot of errors as ESP, ABS, etc.

Profile picture for user MercedesMedic

You should syncronize the key fob. ML is tricky to synch the key. Most other models don't require this but MLs do. I think the instructions are in the owners manual.

 

Instructions on how to sync Mercedes remote:

  1. Insert the key into the ignition.
  2. Quickly remove key from ignition and within 10 seconds hold down the lock button.
  3. Continue holding the lock button, and at the same time press, the unlock button five times.
  4. Next release all buttons and press the gate/trunk button one time.
  5. Your Mercedes remote should be synchronized. Test to see if lock / unlock functions are working.

 

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