I have a 1999 c280 the doors have stopped locking the trunk won't pop and the rear headrests won't go down from switches in car or from key fob. When I push the key fob I hear a click from the Locking Vaccum pump. I Help anyone?

What have you found searching the forums so far? I did a cursory search and found a couple of threads, but nothing exactly as you've described. Did this happen all in one day/night, i.e., you stopped/parked the car, went to drive it and bingo locks and everything inoperable? No previous lock problems minor or major?

Found a pretty detailed thread that might address your problem. It takes you through a few steps to diagnose what type of a vacuum problem you have ......my uneducated guess as to the root of your problem. Unfortunately, it's an old thread and not easy to find. PM me and I'll see if I can direct you to the thread. Full disclosure, 1 wife, 3 daughters, they love driving my Benzes, but think a good paint job is something for your nails. You are brave to venture forth with your 280,

It all happened at once just one day. I don't know what happened, and but those three things not working. Where did u find something on the problem, it took me two days to successfully find the Locking Vaccum pump. It clicks when I use the key fob but nothing from button in car. I'm at a loss. Help!!!!!

PM being sent.