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This all depends on the year of your Mercedes
On the older cars, the mono valve controls the hot coolant flow on the return line of the heater core via rubber diaphragm, which eventually goes bad or is stuck . This valve should close when you turn off the heater, but if it's stuck in the open position you'll have continuous heat circulation and the climate control can't regulate the heat. Start by replacing the Mono Valve. You can DIY for about $45 bucks and ten minutes of our time. This part is located on the right side just behind the battery and below the windshield. Remove the four screws and and harness connector. Replace reconnect and re screw. Start the car check for leaks.
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Where is the Heater motor resistor on 82 Mercedes 300SD?
your resistor is under the glove compartment next to the blower motor
Will a 1978 300d Mercedes transmission work in 1983 300sd Mercedes?
yes
What is the length of a 1982 Mercedes 300SD?
5,020 mm (197.6 in)
What is the 0 to 60 time for an 85 Mercedes 300sd?
slow
How do you replace the ignition switch on a 1982 Mercedes 300SD?
To replace the ignition switch on a 1982 Mercedes 300SD, disconnect the battery and remove the horn pad. Locate the wire behind the horn and remove.
Are all 1882 300sd Mercedes automatic transmissions a 3 speed or 4 speed?
there are NO 1882 300sd, 1982 all has 4 speed at.
What is the difference between a 300SD Mercedes and a 240D Mercedes?
They both are the W123 body type. A 240D has a 2.4 liter 4 cylinder diesel engine, and a 300SD has a 3.0 liter 5 cylinder turbocharged diesel engine. The 300SD is also a higher end S class model.
The heater stops putting out hot air when the engine temperature reaches around 80 degrees celsius on your 1981 Mercedes Benz 300SD and you would like to know what the problem might be?
Check the duo-valve first, then the heater register
How do you change the fan belt on a Mercedes Benz 300SD?
How much it is going to cost
What is the freon capacity for a 1978 Mercedes 300sd?
2.66 lbs R-12
What is the average cost of a windshield replacement of a Mercedes Benz?
I replaced my windshield for 200 and they came to my home to do it. 1981 300sd Mercedes
Why do you have no heat on your 1979 300SD?
No coolant, bad thermostat, bad heater fan
