I have a 1989 240 and I am wondering why the a/c on these cars is so bad when you stop and it's hot out (85-95 Degrees F). Moving is magnificent. Is it the high revolutions of the compressor when moving? Is it the fact that air is going in the front of the car? Are 740 and 760 a/c's better? Where's the fallacy in the 240's? Is it one thing or a combination of things. -R134 refrigerent. Cheers -Hector from USA