i have the ML270 CDI bought it brand new, got a major problem with my all active module, does anyone out there know the part number? or know what else could be the problem, i can't lock my car with my keys (buttons) i have to manually lock from inside then lock the driver door manually with the key.

Its the W163 chassis, 2001.

 

Hi
I had the same issue check the fuse for central locking

 

yes there are like 2 fuses and 3 relays that operate all that. there is a chart on the lid of the fuse box maybe you need your remote relearned.