How To Change My Mercedes Car Key Battery. Release the key as soon as the engine cranks. Your mercedes key fob doesnt work after changing the battery.
You cant start the car. Chrome key battery replacement steps. Pull on the latch end of the fob and the key should remove on its own.
Insert your smart key into the ignition.
Determine the type of key you have. Here are the simple steps to program the key fob. The Chrome Key and Smart Key fobs are slightly different. Then replace it with your new battery.
