Guys, I read Brian Carlton's reply, about getting a thermometer to stick into the vent. He said he was getting 43 degrees out of his vents, which surprised me (I'm not a mechanic), I thought they only put out 55 or so if they were in good shape.

I don't have a thermometer, but I do have a laser thermometer gun. Assuming a normal thermometer would be stuck inside the vents, and give a reading where you could see it on the outside of the vent, I put my laser gun close to the vent, and reading inside there.

Believe it or not, the lowest reading, in the sweet spot, was 11.4 degrees!! Other areas it was about 17, 19, and if I went to the side vents, much different, I forget what it was, but maybe 45, since the air is further from the source. If I even pointed the laser dot at the outside of the vent, it was 25 in the sweet spot, and other areas were 34, 41, etc., depending on where the laser is.

Mind you, today's ambient temps were about 87 degrees.

So I guess the problem with Mercedes a/c systems is not that they don't get COLD enough, there's simply not ENOUGH of the cold! They need more volume of it, to take car of all the heat coming into the cars, by way of the sun's rays.