97 c230 rad fan runs all the time

[pchelms]

Radiator fan runs all the time key on or off,have to unplug to stop.Also the low coolant light on and a/c compressor runs for a minute or two then stops and wont run again untill car is stoped for awhile,Do these symptoms go together or just a bunch of single problems and also I just came into possesion of this car,Thanks for reading and any help

[mbdoc]

Since the fan runs with key OFF, the fan control module must be to blame.

Located behind the left front tire on the frame rail.

[pchelms]

thank you , I replaced the controller and that fixed all three problems.This is a very valuable tool for the mercedes owner