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1990 Mercedes-Benz 420SEL 4.2L Heating System
Posted to European HVAC on 11/10/2014 15 Replies

1990 Mercedes 420 SEL (126) no heat after 2-3 minutes of driving. Heat works after engine started and gets weaker after a little while, every time. New mono valve (two times!), aux pump running, blower works OK, engine temp OK, thermostat not "lazy", fuses OK....

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  Related Documents & Media  1990 Mercedes-Benz 420SEL

 
Message Closed w/FIX

car Vehicle Data

1990 Mercedes-Benz 420SEL

VIN WDBCA3309L
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection
AffectedHeating System
ConditionsNo Heat
Message Closed w/FIX

car Vehicle Data

1990 Mercedes-Benz 420SEL

VIN WDBCA3309L
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection
AffectedHeating System
ConditionsNo Heat