Electrical system

Chapter overview

• Self-diagnosis
  1
• 1 Vehicle diagnosis, testing and information systems
  1
• 1.1 Connecting vehicle diagnosis, testing and information system VAS 5051A
  1
• 2 Immobilizer self-diagnosis
  3
• 2.1 Performing immobilizer self-diagnosis
  3
• 2.2 Fault table
  7
• 2.3 Measured value blocks
  10
• 2.4 Coding immobilizer control unit J362
  11
• 3 Guided functions for immobilizer
  13
• 3.2 Online system test
  14
• 3.3 Adaptation of ignition keys
  14
• 3.4 Adaption after changing engine control unit
  15
• 3.5 Adapting immobilizer
  15
• Starter, current supply, CCS
  16
• 1 Battery
  16
• 1.1 Battery handling instructions
  16
• 1.2 Removing and installing battery
  16
• 1.3 Visual check
  18
• 1.4 Checking electrolyte level
  18
• 1.5 No load voltage measurement
  20
• 1.6 Checking specific gravity of all cells
  21
• 1.7 Battery load test
  23
• 1.8 Charging battery
  24
• 1.9 Quick charging/starting boost
  25
• 2 Starter
  26
• 2.1 Removing and installing starter
  26
• 3 Alternator with poly-V-belt
  30
• 3.2 4-cylinder diesel engine with air conditioner compressor
  31
• 3.3 4-cylinder fuel injection petrol engine with air conditioner compressor
  32
• 3.4 6-cylinder fuel injection petrol engine with air conditioner compressor
  33
• 3.5 Removing and installing poly-V-belt, 4-cylinder engine
  35
• 3.6 Removing and installing poly-V-belt, 6-cylinder engine
  37
• 3.7 Checking alternator carbon brushes
  38
• 3.8 Renewing poly-V-belt pulley on alternator
  38
• 3.9 Removing and installing poly-V-belt pulley with freewheel
  39
• Gauges, instruments
  40
• 1 Dash panel insert
  40
• 1.1 Removing and installing dash panel insert
  40
• 2 Repairing dash panel insert
  42
• 2.1 Vehicles with rev counter and digital clock
  42
• 2.2 Vehicles with multifunction indicator (MFI)
  43
• 2.3 Checking LED
  49
• 2.4 Installing speedometer (G54)
  50
• Radio, telephone, navigation
  52
• 1 Radio systems
  52
• 1.1 Radio system “alpha”
  52
• 1.2 Radio system “beta”
  53
• 1.3 Radio system “gamma” and “gamma with CD changer”
  54
• 1.4 Removing and installing radio
  55
• 1.5 Activating anti-theft coding on radio
  57
• 1.6 Removing and installing cassette storage box
  57
• 1.7 Fitting location of CD changer
  57
• 2 Aerial system
  59
• 2.1 Roof aerial
  59
• 3 Suppression measures
  60
• 4 Loudspeaker system
  61
• 4.1 Removing and installing front right treble loudspeaker
  62
• 4.2 Removing and installing front left treble loudspeaker
  63
• 4.3 Removing and installing rear bass loudspeaker
  63
• 4.4 Removing and installing rear treble loudspeaker
  63
• 4.5 Removing and installing front bass loudspeakers
  64
• Windscreen wash/wipe system
  65
• 1 Windscreen wiper system
  65
• 1.1 Assembly overview - windscreen wiper system
  65
• 1.2 Setting park position
  66
• 1.3 Adjusting wiper blade park position
  66
• 1.4 Removing and installing wiper blade rubber insert
  66
• 2 Windscreen washer system
  67
• 2.1 Assembly overview - windscreen washer system
  67
• 2.2 Adjusting washer spray jets
  67
• 2.3 Connection to windscreen washer pump
  68
• 3 Rear window wipe/wash system
  69
• 3.1 Assembly overview - rear window wipe/wash system
  69
• 3.2 Adjusting rear window wiper park position
  69
• 3.3 Adjusting washer spray jet
  70
• 4 Headlight washer system
  71
• 4.1 Assembly overview - headlight washer system
  71
• 4.2 Adjusting washer spray jets
  71
• Lights, bulbs, switches - exterior
  72
• 1 Headlight
  72
• 1.1 Removing and installing headlight housing
  72
• 1.2 Removing headlight bulbs
  73
• 1.3 Removing and installing headlight range control motor
  74
• 1.4 Adjusting headlights
  74
• 2 Front fog lights
  76
• 2.1 Removing or adjusting fog light
  76
• 2.2 Removing and installing fog light bulb
  77
• 3 Front turn signals
  78
• 3.1 Removing front turn signals
  78
• 3.2 Removing and installing turn signal bulb
  78
• 4 Side mounted repeater turn signals
  79
• 4.1 Removing and installing side mounted repeater turn signal
  79
• 5 Number plate lights
  80
• 5.1 Removing and installing registration plate light
  80
• 5.2 Replacing number plate light bulb
  80
• 6 Tail lights
  81
• 6.1 Removing and installing tail light on saloon
  81
• 6.2 Removing and installing tail light on Variant
  81
• 7 Steering column switch and ignition and starter switch
  83
• 7.1 Assembly overview - steering wheel
  83
• 7.2 Removing and installing cover
  84
• 7.3 Removing and installing horn button
  85
• 7.4 Removing and installing horn button on vehicles with a driver airbag
  85
• 7.5 Contact ring for horn plate
  86
• 7.6 Removing and installing steering lock housing
  86
• 7.7 Removing and installing turn signal and windscreen wiper switches
  86
• 7.8 Removing and installing lock cylinder
  87
• 7.9 Pin assignment on steering column switch
  87
• Lights, bulbs, switches - interior
  89
• 1 Cruise control system (CCS)
  89
• 1.1 Assembly overview - cruise control system (CCS)
  89
• 1.2 Removing control element
  90
• 1.3 Adjusting control element
  91
• 1.4 Removing and installing breather valve
  91
• 1.5 Removing and installing vacuum pump for automatic distance control system V18
  91
• 1.6 Checking vacuum system for leaks
  91
• 2 Anti-theft alarm system (ATA)
  92
• 2.1 Removing alarm system warning lamp K95
  93
• 2.3 Removing and installing anti-theft alarm and vermin repellent system contact switch F120
  93
• 2.4 Removing and installing anti-theft alarm system horn H8
  94
• 2.5 Removing and installing anti-theft alarm system control unit J284
  94
• 3 Interior lights and switches
  95
• 3.1 Removing and installing light switch
  95
• 3.2 Removing combi-warning lamp
  95
• 3.3 Removing and installing interior light
  96
• 3.4 Replacing front passenger reading light bulb
  96
• 3.5 Removing and installing luggage compartment light W3 , Variant
  97
• 3.6 Removing and installing luggage compartment light W3 , saloon
  97
• 3.7 Removing and installing luggage compartment light switch
  97
• 3.8 Removing and installing rear reading lights
  97
• 3.9 Removing and installing sliding sunroof switch E8
  98
• 3.10 Removing and installing door contact switch
  98
• 3.11 Removing and installing electric window switch
  98
• 4 Immobilizer
  100
• 4.1 Removing and installing immobilizer
  100
• 4.2 Removing and installing immobilizer control unit J362
  100
• 4.3 Removing and installing immobilizer reader coil D2
  101
• 4.4 Transponder
  101
• 4.5 Retrofitting fuel shut-off valve control unit J366
  101
• 4.6 Installing fuel shut-off valve control unit J366
  102
• 4.7 Adapting fuel shut-off valve control unit to immobilizer control unit
  104
• 4.8 Functional check of immobilizer
  104
• Wiring
  105
• 1 Relay plate
  105
• 1.1 Removing and installing relay plate
  105
• 1.2 Removing and installing multi-pin connector on back of relay plate
  105