Ken300D-
Is the pushbutton unit on the '87 the same as the one on the W123's? On my 1985 CD, when I push the Economy button, the fan will come on for a minute or two and then turn off by itself. All the other buttons work as they should, but I don't like to run the AC all the time. If I go to an AC button, then to the Econ. button, the same thing happens. Occasionally I can also hear a buzzing, like a short coming from the unit.
The unit I have was replaced by the PO with a brand new MB unit (from a dealer) about 1.1 years before I bought the car. Out of warranty
How do I check the auxilliary water pump?
TIA,
Craig