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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz M-Class (W163, 1997 issue)

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Mercedes-Benz W163
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Mercedes-Benz
W163
Introduction
Controls and receptions of safe operation
Current care and maintenance
Engine
System of cooling, heating and air conditioner
The power supply system and exhaust
Systems of an electric motor
Manual box of a gear change
The transmission automatically processed
Transmission Line
Brakes and auxiliary systems
Suspension and steering
Body
Onboard electric
General information and precautions
Search of causes of failures of electrical equipment
Safety locks - the general information
Circuit breakers - the general information
Relay - the general information and check of serviceability of functioning
The digital CAN data bus
Mounting blocks, parts of control systems
The instrument panel, switches, trip computer
Drive motors
Signal and lights, rain sensors and outdoor temperature
System of additional safety (SRS)
Audio
Wiring
 


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General information and precautions



Before servicing electrical system components on-board read the safety rules when working with electrical appliances!

The car is equipped with 12-volt on-board power supply system grounding of the negative pole. The power supply to the lighting and other consumers from a battery lead-acid type, which is produced by charging alternator.

This chapter describes the procedures for repair and maintenance of electrical components mounted on a vehicle and having no direct connection to the engine. Information service units such as battery, distributor, alternator and starter, see Chapter Systems of an electric motor, dedicated to electrical motor systems.

Before servicing electrical components of the board, in order to avoid electric shock or fire due to short circuit, disconnect the negative cable from the battery. Regularly check the condition of wiring harness and tightened them in intermediate clamps, collars and trim. Make sure that the wire insulation, do not wipe in contact with the nearby components.

Considered in this manual car models are equipped with additional safety (SRS). Before proceeding with any work near the airbag unit, steering column and instrument panel, disconnect SRS to avoid injury if accidentally triggered it, - the wiring of chain SRS is easy for distinguishing on yellow color of isolation!

If installed on the car stereo is equipped with a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action!





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