ac and heat dont work on my 1996 Mercedes C280 on 1996 Mercedes-Benz C280

My ac and heat does not come out , it comes on and i see the temp reading but nothing comes not blowing. someone said i can tap on the blower motor, but i'm not sure where that is located. Took it to auto zone they checked the fuses and the were all good. Is there a relay that i can reset.Also my gas guage does not work unless i go over a speed bump or when i first crank the car up then it goes back to empty. i set the miles now and try not to go over 200 miles per full tank. how can i fix this, what kinda gas should i be using.

by in Simpsonville, SC on October 08, 2010
3 answers
ANSWER by on October 10, 2010
really need to have the Climate Control Computer scanned and a parts store mini-scanner is not robust enough for this type of scan, need a German car scanner capable of reading the Climate Control Computer data. Same with the fuel gauge problem, need to scan the Instrument Panel.
ANSWER by on May 26, 2011
where is the ac blower located
ANSWER by on September 13, 2015
Blower motor is located under your glove department. Same thing happened to me.