AC issue
Thread Starter
Junior Member
Joined: Nov 2014
Posts: 57
Likes: 3
From: Savannah, GA/Mystic/CT
2009 E350 4matic wagon, 1980 450SL, 2011 GL450
AC issue
Our 2011 GL450 AC blows cold...until it doesn't blow. The air at the vents feels cold, but it's not really blowing. If we stop for a few minutes and restart the vehicle, it is fine for another 30-60 minutes. Always happens when driving on the highway in ambient temps in excess of 80 degrees. Any ideas?
Senior Member
Joined: Aug 2018
Posts: 418
Likes: 123
From: Kelowna, BC
08 GL320 CDI
Do you have it set to MAX AC for too long?? (The button below the Rear Defrost button.) I had it on for too long in mine and after a while it stopped blowing air through the vents. I "deduced" that it was icing up inside and not allowing the air to flow. After I had it shut down for a bit, the ice, I assume, melted and allowed full airflow again.
MBWorld Fanatic!
Joined: Jan 2010
Posts: 3,127
Likes: 792
NGL450 w/EORP, S550
Do you have it set to MAX AC for too long?? (The button below the Rear Defrost button.) I had it on for too long in mine and after a while it stopped blowing air through the vents. I "deduced" that it was icing up inside and not allowing the air to flow. After I had it shut down for a bit, the ice, I assume, melted and allowed full airflow again.
Super Member
Joined: Jul 2016
Posts: 709
Likes: 131
From: NE OHIO
1998 SL500,2011 GL550,2009 ML350,past 1995 E320 Cabrio ,2005 ML500,2006 ML500,1996 SL500,1972 280SEL
Gauge set
Time to hang an AC gauge set on the system. Many Indy shops are very reasonable if you don’t have or want to invest in gauges.
