REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz G-Class (W463, 1999 issue)

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Mercedes-Benz
	G-class
		Introduction
		Controls and operation receptions
		Current care and maintenance
		Engine
		System of cooling, heating, ventilation and air conditioning
			Engine cooling system
				Antifreeze - a means of protection against freezing
				Changing the coolant - general comments
				Check the cover of the cooling system, replacement of coolant hoses
				Check thermostat
				Removing and installing thermostat
				Removing and installing radiator cooling system
				Removal and installation of the expansion tank
				Removal and installation of the cooling fan assembly
				Removal and installation of the water pump
				Removal and installation of low-temperature cooler (M612)
				Removal and installation of an engine block heater (with appropriate equipment)
				Removing and installing auxiliary heater STH (with appropriate equipment)
				Removing and installing auxiliary heater circulation pump STH (with appropriate equipment)
			Ventilation systems, heating and air conditioning
		The power supply system and exhaust
		Systems of an electric motor
		Automatic Transmission
		Transmission Line
		Brakes and auxiliary systems
		Suspension and steering
		Body
		Onboard electric
		Wiring

Removing and installing auxiliary heater STH (with appropriate equipment)

Details of installation of additional heater (models 463.250 / 323, code H12)


1 - Exhaust pipe cooling path 2 - The inlet hose cooling path 3 - Fuel Line 4, 5 - Clutches	6 - Bandages 7 - Exhaust pipe 8 - Fixing screws A6 - block the additional heater (STH)

PERFORMANCE ORDER

Poddomkratte car and establish it on props.
Remove protection crankcase.
Drain the cooling system (see chap. Current care and maintenance).
Disconnect the inlet (2) and an outlet (1) from the path of the cooling tubes assemblies STH heater and the water pump.
Disconnect the heater assembly STH (A6) fuel line (3), - ready to collect spilled fuel.
Releasing bandages (6) Disconnect the clutch (4 and 5) wiring - banding must be replaced without fail.
Disconnect the heater STH (A6) outlet pipe (7).
Remove the mounting bolts (8) and remove the assembly of additional heater STH (A6).
Remove the circulation pump (see. Section Removal and installation of auxiliary heater circulation pump STH (with appropriate equipment)).
Installation is in the reverse order.
Finally, remove the path of the cooling air and check the corresponding components for signs of leaks.
Start the auxiliary heater and make sure of serviceability of its functioning, - if the heater is switched off automatically before reaching the coolant temperature of the normal operating value and can not be restarted, so the system is triggered false lock - Drive to an SRT Mercedes-Benz for detailed diagnostics Reader using STAR DIAGNOSIS (6511 1801 00).