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Home >> Mercedes Benz >> 1971 >> 280SL Standard Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> MERCEDES-BENZ 1970-71 Engine Modification With Fuel Injection >> Maintenance >> Checking Ignition Changeover
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Checking Ignition Changeover

Connect tachometer and timing light. Start engine and increase speed, at approximately 2400 RPM the distributor control should adjust ignition timing from retard to advance. Ignition changeover is also noticed by a sudden increase in engine speed.

NOTE: Ignition timing is also controlled by the 17°C (63°F) and the 100°C (212°F) temperature switches. Refer to checking individual switches below.
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