I own a C240 and when I hit lock button on by remote the lock on the drivers side bounce up and down. It some times locks and sometimes does not lock.
This problem just started out of the blue with no issues before it started.
I did some research on Google and found that many other owner of C series have the same problem. My car is out of warranty but this problems should be handled as a recall because it is a common defect.
MB should cover the cost of the replacement and repair. Please contact me at email@example.com.
Review about: Mercedes Benz Car.
Monetary Loss: $600.