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Old 01-26-2001, 05:48 AM
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MBenzNL MBenzNL is offline
Join Date: Jan 2001
Location: the Netherlands
Posts: 1,417
As far as the heater is concerned, I think there is a uncooperative valve that does not work good enough any more.
It seems to me that the valve that has to guide the incoming air-flow towards the heat exchanger is only opened/closed half and that there still is a lot of air coming in the interior without being guided through the heat exchanger...
On the european models (non airco's) this valve was controlled by a cable; I don not know whether the US models are controlled by a cable or by a vacuum pot...

Basically I think you get to much unheated air in your car; the heated air will be warm enough, but the mixture (heated-unheated) is not right and the faster you drive, the more unheated air comes in!

1990 300SL-24
1993 C250D
with a minor 600+k kilometer
(the Netherlands)
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