I have a 2007 GL450, and I have had ongoing A/C problems since buying it. IF it's hot outside, it can take up to 20 or 30 minutes for cool air to come out of the vents. I have owned many cars, and I have never experienced anything like this. Has anyone else experienced this? It's become unbearable to the point where I think I might sell it.
Your going to have one of the following codes. Which one(s)?
9401, 9402, 9403, 9404, 9405, 9406, 9407, 9408, 9409, 9501, 9502, 9503 AND 9505
You might need to get a A/C diagnosis from the dealer for the code, but once you have it I can walk you thru how to fix it.
And the A/C, in your truck is a "instant" on type system. The instant you turn it on it starts out luke warm followed by cold air within 10-15 seconds.
I'm betting its one of the rear temp sensors have melted. Telling the computer its already cold.