Quote:
Originally Posted by Doktor Bert
Your 1979 does not have a Monovalve.
Check your #3 and #9 fuses in the fuse block, as they influence the climate control. Also, many W116's had an in-line (glass) fuse holder in the fuse box just for the auxillary water pump.
Check the hoses on both sides of the CC servo for heat. Also, listen to ascertain of the servo is running (parking) when you turn the switch off.
Report back....there is quite a diagnostic procedure for that system....and you can find the entire thing right here....Robert
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Is a '79 300D a w116?
You sure there is no monovalve?
My '81 300D had one.
heck, take a picture of your firewall in the vicinity of the battery.
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