Where can I find the mercedes C240 radiator fan terminal

I would say the best thing to do here is to contact a Mercedes Independent dealer, and show them your list of fault codes.
A wiring diagram with the electrical connector numbers is required, and there are not many of them around for Mr. DIY.
R12/6, R12/7, n2/7-15r/15 should be identified on the diagram as either wires or connectors. I had a similar readout on my 2001 C240, when oil from the rear crankshaft oil seal was seeping out of the gearbox bottom drain, and saturating the area where the main electrical connection entered the gearbox. something like that may be the problem.

locate the radiator drain plug (normally bottom right or left of the radiator) unscrew and drain coolant (beware of hot coolant) once unscrewed fully, gently pull and turn the drain screw/petcock until removed.

the refit and refill coolant. its also a good time to flush and change coolant,

Most likely the thermostat is stuck/bad.

It is located on the transmission where the sghift cable connects to the transmission.

It must be the coolant temperature sensor or the fan relay. The relay is located in the relay box under the hood. I can't say exactly where on that car.

Connect 2 wires to fan plug, w/ other end of wires touch to battery terminals (disconnect battery to make sure you don't accidentally touch the wires together while doing this, as you can damage the electrical system). When you touch to the batt. terminals, the fan should kick on. If it doesn't, the fan motor is shot, if it does turn on, it is a relay that is bad, not signaling the fan to turn on when it should (as engine temp goes up).

check for fuel pump operation.have someone turn ignition on while you go to rear of car where fuel tank is to listen for fuel pump operation.if not.check fuse and relay.if you hear fuel pump .check ignition system to make sure engine is getting spark.

Hi, You need to replace the alarm siren. It is also a module. It is located in the right front fender well. The reason they go bad is because they are located in a place where they get wet.

How do I synk my Apple I-Phone up to my C-240? Anyone know how?

I have a 2002 C240 Mercedes and need to replace the cabin air filter. Problem, I don't know were it is located or how to replace it. Can you help me.