New OEM Mercedes diesel fuel thermostat. This unit is located down low on the left side of the engine and is very prone to leaking due to age. If you notice wet spots under your engine you might want to check this out. No instructions, but very easy to replace. Can leak coolant, fuel or both. Fits all 190D 1984 to 1989, all 124 300D, 300D and 300D 2.5, all 126 300SDL and 350SD and SDL and 140 chassis 300SD and S350D to 1995.
Coolant Based Fuel Warmer
201 124 126 140 Chassis Diesel Fuel Thermostat