I am putting a 1978 300CD back on the road. Right now I need to get hot water to the heater core. I thought all I needed to do was referb the monovalve - unfortunatly this car doesn't use that device. Instead MB uses a regulating valve and heating water pump. I would appreciate any data relevant to these parts. Troubleshooting info would be most helpful. I have MB service CD's - they are of little help. Specifically a part no. and vendor for the bi-metal temperature switch that sits under the heating water pump would be great. Any experiance getting this nightmare going again would be fantastic.

tlcbenz