REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz E-Class W123 (from 1976 to 1985, the year of issue)

general info. full specifications. diagnostics. hints. tips. tricks

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Mercedes-Benz
	W123
		Introduction
		Gasoline engines
			Design and specifications
			Engine adjustment
			Ignition system
			Power system
			The fuel injection system K-Jetronic
			The fuel injection system L-Jetronic
				Checking injectors
				Adjusting the engine idling
				Check valve further fuel supply
				Check thermo
				Check thermoelectric switch
				Check thermal time relay
				Possible malfunctions of the system L-Jetronic, their causes and remedies
			Works by car
			Work on the engine M 102
			Work on the engine M 110 and M 123
		Coupling
		Manual transmission
		Automatic Transmission
		Driveline and rear axle
		The front suspension
		Rear suspension
		A steering
		Brakes
		Electrical
		Body and Equipment

Check thermal time relay

PERFORMANCE ORDER

Remove the air filter.
Turn on the ignition, disconnect the hose from the thermal time switch off the tee and a hose of a vacuum regulator ignition Blow these hoses.
When the intake air temperature of 20 ?� C relay contacts should be open. At temperatures below 20 ?� C, the relay must be switched off about 15 seconds after the ignition is switched on.
To replace the relay Disconnect and remove the valve from the intake manifold.