Mechanics

I HAVE A MERCEDES GL 450, THE AIRCONDITIONING STOPS WORKING RANDOMLY ALTHOUGH USUALLY IN HOT HUMID WEATHER, IT INITIALLY BLOWS COLD THEN WILL BLOW REGULAR AIR FOR 15-20 MINUTES ONLY TO START BLOWING COLD AGAIN? WE HAVE BEEN TO MERCEDES DEALER, USUALL

2008 Mercedes Benz GL450 • 49,000 miles

As above, AC just goes from blowing cold to normal air temp intermittently usually once a day for 20-30 minutes, then it resumes
normal function
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Gpetro
May 1, 2012.



Sugest have a diagnosis done system complex and numerous possibilities

Docfixit
May 1, 2012.
I have the same issue with my AC ( GL450 2009), I took it to Mercedes dealership and they too are guessing what might be the problem. They wanted to change teh Climate Control unit for $1700 and that is not guarnteed that will work. Did you find out what was the cause?