Diagram of 1999 c240 elegance cooling system and electric radiator

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.

The main cooling fan on this 1999 jeep cherokee, the main fan all depends.

These jeeps come with diffrent fan set ups. Here are a few, the first may be a fan driven off the motor by a fan belt and a another fan which is electric. the primary fan used for cooling is the fan that runs off the engine with a belt. the other electric fan is more the air conditioning system, this fan is used for cooling the condensor mainly. the engine driven fan is for the cooling system.


Another system fan set-up on these jeeps would be the motor driven fan by belt with another electric fan in front off it, the diffrence between the first and this one is that the first fan system is side by side and this one is set-up one in front of the other but the concept is the same, the fan driven by the engine is mainly for the cooling of the engine coolant and the electric fan is for air conditioning cooling.

In both set-ups the electric fans also help the cooling system but are mainly used for the help in cooling when the a/c is turnned on, the a/c condensor builds up heat the same as the radiator does, one fan is unable to cool both the radiator and the condensor, this is why some cars have two fans.

Good day, hope this is helpful,

normaly the bottom hose block bottom radiator out let with a rag so water will flow through the motor then unplug bottom out let jam garden hose in outlet with a rag remove top hose & reverse flush from bottom 2 top ps.make sure 2 remove all rags when finished

3.2L & 3.5L Engines

1. Disconnect negative cable
   
2. Drain cooling system.
   
3. Raise vehicle on hoist.
   
4. Disconnect electrical connectors from engine oil and power steering pressure switches.
   
5. Disconnect radiator and heater hoses from thermostat housing.
   
6. Remove thermostat housing bolts.
   
7. Remove housing, thermostat, and gasket.
   

To install:

1. Position gasket on thermostat and housing.
   
2. Install thermostat housing, gasket and mounting bolts onto block. Tighten attaching bolts to 105 inch lbs. (12 Nm).
   
3. Install radiator hose.
   
4. Install bypass hose.
   
5. Connect electrical connectors from engine oil and power steering pressure switches.
   
6. Connect negative cable.
   
7. Fill cooling system.
   
8. Inspect for leaks.
   
9. Lower vehicle on hoist.
   

Electric Engine Fan - Fan Switch

Removal & Installation
2.7L Engine

1. Disconnect negative battery cable.
2. Partially drain cooling system.
3. Disconnect the electrical connector .
4. Remove engine coolant sensor from coolant outlet tube .
   

To install:

1. Apply thread sealant to sensor threads.
2. Install engine coolant temperature sensor into coolant outlet tube.
3. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
4. Connect electrical connector to engine coolant temperature sensor .
   

3.2L And 3.5L Engines

1. Disconnect negative battery cable.
2. Partially drain cooling system.
3. With the engine cold, disconnect coolant sensor electrical connector.
4. Remove sensor.
   

To install:

1. Install engine coolant temperature sensor.
2. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
3. Attach electrical connector to sensor.
4. Connect negative battery cable.

Removal & Installation

1. Disconnect negative battery cable.
2. Partially drain cooling system.
3. Remove upper radiator hose.
4. Disconnect cooling fan electrical connector.
5. Remove cooling fan mounting bolts.
6. Remove radiator cooling fan assembly from vehicle.
   
   
   Fig. Removal and installation of the radiator fan-2.7L Engine shown
   

To install:

1. Position radiator cooling fan assembly in vehicle.
2. Install cooling fan mounting bolts. Tighten to 50 inch lbs. (6 Nm)
3. Connect cooling fan electrical connector.
4. Install upper radiator hose .
5. Fill cooling system.
6. Operate engine until it reaches normal operating temperature.
7. Check cooling system and automatic transmission for correct fluid levels.

Hope helps (remember comment and rated this).

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).

Not good, or easy fix. Many things can cause this. Hopefully, its a gasket on the intake manifold. If not that then Head gaskets. From there, you have cracked heads/block. If you have an oil cooler in the radiator, I have seen them leak and cause this also.

The radiator cooling fan used on the 4.0L engine is
an hybrid fan design. The hybrid fan system consist
of a low speed viscous driven mechanical fan and a
electrical fan.
The hydraulic fan used on vehicles equipped the 4.7L engine, replaces both the electric fan and the engine driven mechanical fan. The hydraulic cooling fan is integral to the fan shroud and is located between the radiator and the engine. The power steering pump supplies the hydraulic fluid and pressure to rotate the cooling fan blade, while the electrical part of the fan is controlled by the JTEC. The hydraulic fan drive (motor) consists of the three major components:
- Steering flow control valve
- Fan control valve
- Two stage G-rotor hydraulic drive
The hydraulic fan and drive is not serviceable.
Therefore any failure of the fan blade, hydraulic fan
drive or fan shroud requires replacement of the fan
module because the fan blade and hydraulic fan drive
are matched and balanced as a system and servicing
either separately would disrupt this balance.

Below are instructions and a diagram for removing the radiator from your Santa Fe. There's nothing involving the motor mounts. Best of luck and please post back with any questions or just to rate the solution. Greg

1. Drain the cooling system. Remove the radiator cap to speed draining.
2. Remove the inlet hose from the radiator.
3. Remove the transmission oil cooler lines from the retainer clip at the bottom of the cooling fan shroud.
4. Remove the fan shroud clip from the condenser tubes.
5. Remove the bolt that connects the fan shroud to the condenser hold down bracket.
6. Remove the air deflectors from the top of the radiator.
7. Remove the cooling fan shroud bolts.
8. Remove the coolant reservoir hose from the radiator overflow neck.
9. Remove the radiator upper support brackets and bolts that connect to the fan shroud.
10. Disconnect the engine cooling fan motors electrical connectors.
11. Remove the cooling fan motors electrical harness from the fan shroud clips.
12. Remove the cooling fan shroud.
13. Remove the outlet hose from the radiator.
14. Disconnect the transaxle oil cooler pipes from the radiator.
15. Tilt the top of the radiator rearward.
16. Remove the condenser hold down bracket from the radiator.
17. Lift the condenser from the mounting tabs on the radiator and position the condenser aside.
18. Remove the radiator.

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