reason I ask is that my 1990 300TE is goofy son of a gun as well in that regard and I ignore the thing....tempermental piece of technology....the climate control system wants to run everything for you, as if you are idiot or too important to actually do it yourself....I just put it to all warm or all cold and screw the fan control thing....what junk...I swear that is where I draw the line between MB and BMW....MB is so concerned about you, the driver, not having to do anything other than the pleasure of motoring that they overdo this kind of crap....BMW concentrates more on the actual automobile fundamentals..handling, engine....tell you what...I gotta go with BMW over Mercedes as far as quality....I hate to say it but I must