We bought a 2002 CLK430 convertible earlier this year. On several occasions, one or more of the windows have gone all the way down by themselves when the car is turned off. It's a little disconcerting to park the car, lock it, and find the windows down when coming back to the car! Sometimes, it's just one rear window, sometimes it's all the windows. The most recent time it was all but the driver's window, which is how it is now, in the garage, thankfully.

Also, on several occasions, the trunk lid has unlocked by itself, always while we are driving. We took the car to the closest MB dealer (200 miles from here) last month, but they did not fix it. We're taking it to an independent shop here in town next week. They are good, and undoubtedly less expensive than the dealer, but they are not MB specialists.

From what I've read, a short in the wiring or a bad ground might be the problem.

Any ideas to share with the shop?

Thank you.