Air Conditioning on Mercedes-Benz GL450

Problem Data
Average mileage: 52,000 (21,000–75,000)
3 model years affected: 2007, 2008, 2009
4 people reported this problem
Viewing 1 - 3 of 3 comments
Air Conditioning randomly does not work. Have to shut off car, take out key and restart and sometimes works. Dealer claims needed software update but still does the samr thing. Going back for third time Friday
A/C often blows decidedly un-refrigerated air. Problem was diagnosed as a bad compressor, which I then had replaced. The issue seemed better for awhile, but now is back to randomly - but fairly frequently - blowing warm air from the vents, even when set on MAX AIR.