S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

Ac and sunroof

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Old Dec 30, 2015 | 07:56 AM
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Eli420sel's Avatar
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1986 420 sel
Ac and sunroof

Hey everyone I'm nre to the Benz world I have some questions ivr got a 86. 420sel my sunroof works when it wants too and stops midway I don't know what the problem is , and .y ac blows hot and I've even put freon refills nd still blows hot any body know what the problem could be ?
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Old Jul 8, 2016 | 02:26 PM
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mb126fix's Avatar
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300SE
I was just looking for a solution to a problem and found your message. Don't know if you got either fixed, but I can share my experience with the car blowing hot air.


Don't know about your model, but I had the same problem with my 300SE. It turned out that it was the heater monovalve-the diaphragm was torn so hot water was flowing through and blowing hot air. I replaced the monovalve kit, which solved the problem that problem
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