Car Questions
RepairPal is your advocate for car care advice and guidance

How can I reset the ac unit. The ac off light is on and it blows hot air.

(2003 Mercedes-Benz E500)
in Taft, CA on July 02, 2013

We've checked the freonand belts and condensers and compressors.
Displaying 1 answers & 0 comments
Popular Answer
on October 25, 2013
I have had the same problem twice over the last five years in my 2003 e500 sport. We could not find any reset protocol and finally took to a Mercedes mechanic who reset with computer somehow. I have unlimited access to alldata and was unable to find any assistance there on the internet.

I think the problem may be related to the automatic shut off for the compressor when Freon low and then the failure of your aux battery seems to not allow for the resetting. Freon will be full and the compressor will not work without resetting but no ability that I am aware of without taking to shop
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I need brakes for my 2004 Mercedes E500 and a local shop quoted me $754 for the job. Thats the front pads and rotors....
Didn't find what you were looking for?