thank you. it looks like a nightmare to hunt down single parts maybe it's better to get the whole kit.
however before ordering such an expensive p/n I want to be sure it matches the car, how do I double check?
Definitely better to go with a kit if you can find one. The webasto Thermotop units are all the same, pretty much. The major differences are the burner- if it’s meant to run on gas or diesel, and the burner size.
There is a Thermotop E, for economy, Thermotop C, for commercial, and Thermotop Z (an air heater). The air heater just blows hot air, it’s a good supplemental heater for a bus, boat or camper or truck with a big cabin. The C and E units warm coolant that runs to the radiator and heater core to pre-warm your engine and your cabin (blows warm air as soon as you start the blower). The E economy unit has a smaller burner, it puts out 2kW or 4.2kW in low and high modes. It’d be fine for a small car. The C commercial unit has a larger burner and puts out 2.6 or 5.2 kW and is better for trucks or busses, or warming a car very quickly. Both the Thermotop C and E models are further designated by the letters D, if they run on diesel, or B if they run on benzin (Gasoline). Therefore you’d look for a Thermotop E/B or Thermotop C/B.
Also the dosing fuel pump is supposed to be specific to either gas or diesel. The diesel pump can cause cavitation and creates air bubbles when running gasoline, which causes problems for the heater. So says the Webasto factory technicians. If you’re in doubt, ask the seller if it will work for your car.
You’ll need a way to mount the unit to the car. You can get creative and make a bracket, or use a universal bracket from Webasto, or get the VW bracket. As for wiring, VW has a harness, although I haven’t used it, otherwise you have to modify the Webasto harness to tie into the car. It only has a couple leads (ground, power, engine rpm, parking brake sensor, engine temperature, ?) so it isn’t the worst thing to have to wire.
