Well I have one... Hot air comes thru a pane, that has a little wheel on a
side. It closes and opens income of air straight from out - and that air
DOES NOT pass thru heater. Did you close it, so ALL incoming air passes thru
heater? Because form your explanation it seems, that you DIDN'T close it,
and the higher speed, the more cold air coming, and the less heating effect
form heater is possible.
I had the same problem. Replace the climate control. Its located on
the firewall nearer to passenger side. This fixed all my heat and air
conditioning problems exactly what you are describing
> Hello all, I have a 1993 190E 2.3L. The heat seems fine at the
> speeds, but at the highway speeds it seems highly inadequate.
> ambient temperatures are in the mid 30s Fahrenheit. Does
> anyone have
> any suggestions?
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