2006 Mercedes ML 350
I bought a 2006 ML350 about 4 weeks ago and have a question about the rear A/C system. The ML has the dual zone climate system. On the right control I know that pushing the rear button will turn the red light out and the rear system comes on and the auto button in the rear lights up, and you have rear air flow. I usually want the rear system on to put a little air in the back of the car on the really hot days we are having. Sometimes I noticed that the rear air was off and the red light would be on at the rear switch on the front control unit. I was blaming my wife for hitting the switch in the rear with her purse when she gets in the car. You can push the switch and the unit comes back on and all is well. My question is now the rear button is off by default every time you get into the car and start it up. you can pust the button and the red light goes out and all is well until you park the vehicle and restart it again. I thought once you turn on the rear air it would always come on each time you start the car. The owners manual does not say if you have to push the button on each startup. The only info they give is when it is real hot you should shut the rear system off to allow max cooling in the front area. Does the system not come on at startup due to high temp outside or do I have a problem with something . It just started or I just noticed yeaserday having to turn it back on each time. I hope some one can tell me if the red light is on by default when you start the car in the morning. If you turn it on and shut the car off it will come back on if you just restart the car. Could I be having a voltage problem or memory problem with one of the systems? That is the only setting on the vehicle that is not working the way it was.