I have a 95 sl500 and the a/c - heat blower will only blow low speed reguardless if in auto or manual mode. WEIRD thing is that when the key is on but engine is off I get all fan speeds. A/c compressor is working ok. I have surfed this forum and others and haven't found anything specfic to my problem but tried the ignition key wiggle without any change. Any help would be great.