I had a problem with the AC on my 2000 ML320 not cooling down the vehicle last week when the outside temp was around 85 degrees. I had remembered reading this forum thread and checked my #44 fuse which turned out to be blown (fuse socket stamped as "AC blower"). I took the truck to the local MB dealer and mentioned the fuse #44 issue. They replaced the wire harness and upgraded to the 40amp fuse saying that was the reason the AC was not cooling. I am pleased to have gotten the upgrade but is that a logical fix for the AC problem? It's only 70 degrees outside this week so I can't realy test the AC to tell if it works any better now.