at any time do your hear a flapping shut noise behind the middle dash vent or glovebox area? if so it is the main air flap that controls the amount of outside air to mix with the desired climate control setting. it needs to be shut all the way when maximum cooling is set.

__________________
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)

609 Certification