Have recently bought a '92 300E Formatic (150K on the clock). Nearly all systems work. One problem is that the 'recirculation' button has a mind of it's own. After about 30 minutes of driving, the red light begins to flash and I can only get warmed air. This happens even when the temperature dial is set for AC. At no time have I actually activated the recirc switch. Poltergeist, perhaps mein Herren? Did a driveby at the local MB dealer where the mechanic posited that it was the switch but couldn't be sure unless he did an electronic diagnosis ($150). Any suggestions. The other problem is that the antenna doesn't go up and down, but the motor apparently is working ??????