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 thermo

PERFORMANCE ORDER

To check the status of the thermo disconnect the hose to the vacuum regulator ignition gauge-distributor, disconnect the hose from the tee and Blow into the tube. When the coolant temperature is 13 ?� 3 ?� C the valve must be opened. It must close at 20 ?� 3 ?� C.
When installing the valve top up the coolant to normal.