I have an 87 300TDT and was looking for the aux water pump. As I understand it is behind the passenger headlight. Well I can't find it. It should be noticable. Is there any other locaton it could be? I don't even see mounting holes or brackets there to indicate there ever was one.

I couldn't tell you for sure as I am not familiar with the 124's, but it should be easy to find if you follow the heater hoses from the front of the engine to the firewall.

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'83 300D Turrrbo 295K miles

look directly behind the washer res about 2' down. you need to remove washer res to remove it.

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Paul
Benz-less
I need an SDL !

OK I will look there, I want to check it before repairing the heater

Ive heard for non-veg oil cars its sort of pointless. I use it in mine rewired to run with key on to push coolant all the way to trunk and back. When I pulled mine it was rusted shut but heat worked very quickly without it...

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Paul
Benz-less
I need an SDL !

My '87 300TD had no aux water pump. It does have a heat valve, but not a monovalve, to control water flow to the heater.
Unplug the electrical to get full water flow to the heater.