MERCEDES-BENZ 250 & 250C Engine Modification: Description

The engine modification system used on Mercedes-Benz 250 & 250 C models consists of the following components: An RPM switch, relay box, two-way valve, three-way valve, and two temperature switches. The oil temperature switch opens at 17°C (63°F) and the coolant temperature switch opens at 100°C (212°F).