I have a 1982 300sd that I am slowly refreshing. The next system that I will tackle is the heating.

Questions are:

#1 Do/should I replace the entire Mono Valve or is rebuilding it just fine? If rebuilding it will do the trick is Einstatz a quality product? I found a kit for $14.95. Have read and will look at putting an inline fuse in the circuit as well to protect the HVAC Pushbutton controller which will be replaced with a rebuilt unit from Programa.

#2 As a safeguard I plan to replace the auxillary water pump. I see the prices are all over the place for OEM and aftermarket. Recommendations?

FCP Euro OEM $421.95
Eckler's OEM $90.00

MTC Brand $75.13
Vollig Brand $52.00 (quality aftermarket part?)

In addition to this all the hoses will be renewed, new MB thermostat, the heater control flap vacuum pods either replaced or rebuilt, and the AC system upgraded.

Thanks

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1982 300SD
1992 190e 2.3 8v
2002 P38 Range Rover