My '97 SL320 runs great until I turn on the A/C. When I have the A/C on, the car will sometimes not respond to acceleration. In fact, I'm afraid to pull our into traffic because I'm not sure if the vehicle will even move. When I accelerate from a dead stop, sometimes it acts normal and other times it just sits there even when I push the accelerator all the way down. It eventually will seem to catch and move, but I never know when it will and when it won't. If I turn off the A/C, the car again responds normally. Does anyone else have this problem or know how to fix it?