Ignition Change-Over (Model 600)

Connect timing light and tachometer and start engine. Ignition timing should be 5° ATDC at 600 RPM. Connect wire of 100°C (212°F) switch to ground. This should advance the ignition by 12° and raise engine speed by approximately 200 RPM. Switching on the air conditioning should also advance the ignition timing.

Fig 1: Two-Way Valve & Relays (4.5 V8 Models)

Courtesy of MERCEDES-BENZ USA

Fig 2: Two-Way Valve & Relays (600)

Courtesy of MERCEDES-BENZ USA