Mechanics

NO HEAT

1990 Mercedes Benz 300sd

Heater problem
1990 Mercedes Benz 300sd 6 cyl Two Wheel Drive Automatic 224000 miles

I have a 300e. Gives no heat. Fan and blower work. Any idea what to check?
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Medic630
October 12, 2008.



Have you checked the heater control valve, following your heater hoses from the engine make sure they are hot going in to the firewall and make sure it is hot coming out.

Dr Loot
Mar 7, 2009.