Hi Everyone,

I tried to turn the heater on the other day, and absolutely nothing happened. No fan sound, nothing!! (as I'm in LA, it wasn't necessary to turn on the heat, so I never tried it). I figured its something electrical, but I've been doing the regular new owner type repairs, valve adjustment, fuel filter change, diesel purge, etc, etc, and I've noticed that there are disconnected hoses all over the place. So I figured that I should take care of the mechanical part of the heater, then worry about the eletrical later.

That being said, I've got a lot of disconnected hoses, and hoses that go no where, so I have no idea where to begin. There's a hard rubber hose that is open right in the middle of the firewall just below the throttle bushing that has no hose attached. There's also a hose that goes from the aux water pump to the water pump on the engine (which is located passenger side near the headlight assembly), but it's not connected to anything. I haven't checked under the passenger side dash yet, so I don't know what's there or what's not. I don't know the plumbing of the heater, so I have no idea where those hoses go. All I know is that there's an auxillary water pump, and a mono valve (which are connected btw), and some disconnected hoses. That's all I've figured out.

Finally, here's my question or questions rather. Where does it get it's heat from?? It has to get it from the engine block someplace, right?? Is there someplace online that has a 'plumbing' diagram of the whole heater system??

I understand this will probably take a long time to fix. I'm not fixing it right away, I just want to get prepared and plan ahead so I know what I'm getting into and I know what to expect.

Thanks in advanced!!!

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1984 300D Turbo -- Just bought it June 2007 for only $650. My first Mercedes-Benz and my first Diesel.
1964 VW Karmann Ghia -- in parts Long overdue for a restore.
2006 Audi A3 -- Great car, but I hate the car payments!!