Sorry about the flippancy comment, being funny, as mechanics we sometimes can get opinionated. (I know I have). valid points made, however;

If you use dry nitrogen what pushes it through? shop air? The mastercool guns say use shop air, the auotzone DVD guy Bruce Bonebrake uses shop air. Anyway I had once called about nitrogen at the local welding supply and the cost for the set up/ ect. plus tank was not cost effective for my occasional use. Agree nitrogen would be choice but in the real world who uses it, knows or bothers.

At lunch around town vent temps all of a sudden changed from being stuck on 60, to 50 > with low blower setting. I took the car out on the freeway for 2 hours, 86-91 ambient outside temp and got 40-60 vent temps depending on acc/blower settings. I think I have an evaporator fin air flow/blockage issue. The back seat vent blows a little stronger. (replaced blower motor last year). I will try and use the foam cleaner in the blower case holes and see if that helps. Otherwise I may leave it alone and just monitor during the comming heat months. (My W126 may be relegated to feeway cruiser this summer and my W124 around town since it has a more up to date/stronger a/c system, especially around town). Will keep you posted and thanks.

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

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