New batteries in the keyless remote - ML320
 

I just replaced the batteries in my spare keyless remote but don't know how to get the receiver programmed to accept it again. It's batteries were absent for about 3 months. Any way to avoid the dealer?

synchronization
 

try this and let me know if it works

Turn key in steering lock to position 2, then to position 0 and remove. Within 60 seconds, push and hold the lock button for 15 seconds, now push unlock button 5 times. Then check all functions

Ray
mercedessd@cox.net

More like this:
Key to position 2 (ON position), then turn off and remove key.
Hold down "lock" button, and push "unlock" button 5 times within 10 seconds. Then release buttons and push either the lock or unlock button to confirm operation.

Gilly

Thanks for the suggestion but I tried several times and no luck.

NOW THAT DID WORK. THANKS!!!!!
Hope I can return the favor sometime.

key
 

sorry for the bad information, and thanks gilly for the correct procedure, i have since updated my info. thanks

Carson, your way was pretty much correct, it just has to get done within 10 seconds (including the last step where you confirm operation).
Earlier models you had to press the unlock button more like 10 times in 10 seconds, so it really had to be done fast.
Gilly