I am having some problems with my Keyless Entry on a 1997 C230. More recently, the keyless entry only works about 25% of the time. No matter which sensor I point the remote at to lock/unlock, it sometimes refuses to work, and Im forced to walk to the passanger side to unlock/lock the car. Ive replaced the batteries in both remotes of mine, and both give the same problem. Is it possible for the sensors to go bad? I do not have tinted windows or anything that could interfear.

Let me know if anyone has an idea as to what could be causing this problem.

Thanks!

 

infrared or frequency type?

does it happen to the other key also?

 

Yes, both keys. Infraed.