Davco Filter / Water - Separator / Heater

This is the fuel filter/heater that I have in my 1984 Mercedes 300D. This is the description from the Davco Technology, LLC website.

The Model 234 is the first Fuel Filter, Water- Separator, Heater of its kind developed for the Alternative Diesel Fuel Market.

This unique system uses heat drawn from the cooling system, or the automatic transmission, and routed through an internal radiator to provide the maximum amount of heat during operation and maximum life with its Plus sized filter.

My experience has been excellent with this system. I especially appreciate the transparent dome on the unit. This allows me to easily see when the filter is dirty and ready to be changed. When the car is cold and the fuel level in the unit is still near the top, it is time to change the filter.