Auxiliary Electric Water Pump (For Heater)

FITS THE FOLLOWING, all 116, 123, 107, 126, and 201 chassis. This is a Quality German aftermarket pump. If you are having heating problems this little unit is often overlooked. When you car is stilling at a stop light there is not enough circulation in the engine coolant to get hot water moving through the heater core. This little electric motor helps to push a consistent water flow through the core. When it fails it kinda creates another problem as well. Not only does it not help push hot water through, but it will actually create a blockage in your heating system.

If you heat is dropping off while the car is idling, then this could be the culprit. It is located in the engine compartment between the two firewalls on the 126 in line the the heater hoses going into the fire wall. Find it and with the engine running put your hand on it. You can usually feel the vibration if it is running. It will also leak over time and you will notice coolant loss on longer trips. This item is not difficult to install yourself.