I have a 1984 190E and I recently took it to PepBoys to have the brakes done. 2 days after I got it back, it drives bad. The car vibrates as you accelerate and then is quiet when you're coasting. Any ideas? Also, the temperature/gas meter isn't working, but the oil gauge is fine. Anything I can troubleshoot myself without taking it in? And lastly, the sunroof doesn't work. Already tried changing the the switch, could it be the motor? Thanks for the help and Great website!!!