I have a 2003 MB c320 with the original key. The key is able to start the car perfectly fine, but when it comes to using the remote buttons, nothing works.
When I try pressing the lock, unlock or open trunk buttons, the car doesn't react, and I know the key has batteries because the red LED flashes every time I press them. I thought maybe the key isn't programmed properly to the car anymore, but then it shouldn't be able to start it either right?
Is there anyway I can reprogram, reinitialize or reset the key so that the buttons would actually work? I know I can bring the car to the dealer, but I don't think it's worth spending all that money to get another key with working buttons.
If it helps, the rear window and the rear passenger windows are factory tinted and we also have a w203 replacement key (the buttons on that one aren't working either).
Any help is appreciated!