Electrical system

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety precautions when working on vehicles with a start/stop system
  1
• 1.4 Safety precautions when working on the cooling system
  2
• 1.5 Safety precautions for working on vehicles with auxiliary heater
  2
• 2 Repair instructions
  4
• 2.1 Contact corrosion
  4
• 2.2 Routing and attachment of lines
  4
• 3 Battery
  5
• 3.1 Types of battery
  5
• 3.2 Battery - general notes
  5
• Starter, current supply, CCS
  6
• 1 Battery
  6
• 1.1 Assembly overview – battery
  6
• 1.2 Removing and installing battery
  8
• 1.3 Disconnecting and connecting battery
  11
• 1.4 Checking battery
  13
• 1.5 Charging battery
  13
• 1.6 Removing and installing earth wire with battery monitor control unit J367
  13
• 1.7 Adapting battery monitor control unit J367
  15
• 2 Alternator
  16
• 2.1 Assembly overview - alternator
  16
• 2.2 Removing and installing alternator
  17
• 2.3 Checking alternator
  26
• 2.4 Repairing alternator
  27
• 2.5 Checking poly V-belt
  32
• 3 Starter motor
  34
• 3.1 Assembly overview – starter
  34
• 3.2 Removing and installing starter
  35
• 3.3 Checking starter
  46
• 4 Start/stop system
  47
• 4.1 General description - start/stop system
  47
• 4.2 Assembly overview - start/stop system
  48
• 4.3 Removing and installing start-stop operation button
  50
• 4.4 Removing and installing voltage stabiliser
  51
• Gauges, instruments
  54
• 1 Dash panel insert
  54
• 1.1 General description - dash panel insert KX2
  54
• 1.2 Removing and installing dash panel insert KX2
  55
• 2 Horn
  61
• 2.1 Removing and installing treble horn and bass horn
  61
• 2.2 Checking treble horn and bass horn
  62
• Windscreen wash/wipe system
  63
• 1 Windscreen wiper system
  63
• 1.1 Moving wipers to service position
  63
• 1.2 Removing and installing wiper arms
  63
• 1.3 Removing and installing wiper frame with linkage and wiper motor
  66
• 1.4 Removing and installing wiper motor
  68
• 1.5 Removing and installing wiper blades
  71
• 1.6 Adjusting wiper arms
  74
• 1.7 Removing and installing rain and light sensor G397
  76
• 2 Windscreen washer system
  83
• 2.1 Assembly overview - windscreen washer system
  83
• 2.2 Removing and installing filler pipe for washer fluid reservoir
  84
• 2.3 Removing and installing washer fluid reservoir
  85
• 2.4 Removing and installing windscreen washer fluid level sender
  86
• 2.5 Removing and installing windscreen wash pump
  88
• 2.6 Removing and installing windscreen washer system spray jets
  89
• 2.7 Adjusting spray jets for windscreen washer system
  91
• 3 Washer fluid lines
  92
• 3.1 Repairing washer fluid lines
  92
• Lights, bulbs, switches - exterior
  93
• 1 Headlights
  93
• 1.1 Operation and safety notes for gas discharge lamps
  93
• 1.2 Assembly overview - headlight
  95
• 1.3 Removing and installing headlight
  105
• 1.4 Adjusting headlights
  110
• 1.5 Removing and installing front turn signal bulb
  111
• 1.6 Removing and installing side light bulb
  116
• 1.7 Removing and installing dipped beam bulb
  121
• 1.8 Removing and installing main beam bulb
  126
• 1.9 Removing and installing daytime running light and main beam bulb
  132
• 1.10 Removing and installing gas discharge bulb L13/L14
  136
• 1.13 Removing and installing gas discharge bulb control unit J343/J344
  140
• 1.14 Headlight conversion for left-hand/right-hand traffic
  141
• 1.15 Removing and installing headlight range control motor
  147
• 2 Main beam headlights on roof
  150
• 2.1 Removing and installing main beam headlights on roof
  150
• 2.2 Removing and installing bulb for main beam headlights on roof
  153
• 2.3 Adjusting main beam headlights on roof
  155
• 3 Fog lights
  159
• 3.1 Assembly overview - fog lights
  159
• 3.2 Removing and installing fog light
  160
• 3.3 Removing and installing fog light bulb
  162
• 3.4 Adjusting fog lights
  162
• 4 Side turn signals
  163
• 4.1 Removing and installing turn signal repeater
  163
• 4.2 Removing turn signal repeater bulb
  164
• 5 Tail lights
  166
• 5.1 Assembly overview - tail light
  166
• 5.2 Removing and installing tail light cluster
  167
• 5.3 Removing and installing tail light bulb
  168
• 5.4 Removing and installing brake light bulb
  169
• 5.5 Removing and installing rear fog light bulb
  170
• 5.6 Removing and installing reversing light bulb
  171
• 5.7 Removing and installing turn signal bulb
  172
• 6 High-level brake light
  174
• 6.1 Removing and installing high-level brake light
  174
• 6.2 Removing and installing high-level brake light
  177
• 7 Number plate light
  178
• 7.1 Removing and installing number plate light
  178
• 7.2 Removing and installing bulb for number plate light
  179
• 8 Load area light
  180
• 8.1 Removing and installing load area light
  180
• 8.2 Removing and installing bulb for load area light
  182
• 9 Steering column switch module
  183
• 9.1 Removing and installing steering column switch module
  183
• 9.2 Removing and installing ignition/starter switch
  186
• 9.3 Removing and installing lock cylinder
  188
• 9.4 Removing and installing steering lock housing
  190
• 10 Parking aid
  193
• 10.1 Assembly overview – parking aid
  193
• 10.2 Removing and installing parking aid control unit
  195
• 10.3 Adapting rear parking aid control unit
  196
• 10.4 Removing and installing rear parking aid warning buzzer
  197
• 10.5 Removing and installing front parking aid warning buzzer
  198
• 10.6 Removing and installing rear parking aid senders
  200
• 10.7 Removing and installing front parking aid senders
  202
• 11 Towing bracket
  205
• 11.1 Removing and installing trailer detector control unit
  205
• 11.2 Connector pin assignment for trailer socket
  206
• Lights, bulbs, switches - interior
  207
• 1 Lights and controls in the dash panel
  207
• 1.1 Overview of fitting locations - switches in centre of dash panel
  207
• 1.2 Removing and installing light switch
  209
• 1.4 Removing and installing buttons in dash panel
  212
• 2 Lights and controls in front doors
  216
• 2.1 Removing and installing window regulator switches in driver door
  216
• 2.2 Removing and installing window regulator switches in front passenger door
  217
• 2.3 Removing and installing mirror adjuster switch
  217
• 3 Lights and controls in rear doors
  220
• 3.1 Removing and installing window regulator switch in rear doors
  220
• 4 Lights and controls in the centre console
  222
• 4.1 Removing and installing buttons in centre console
  222
• 5 Lights and controls in the roof trim
  224
• 5.1 Removing and installing front interior light
  224
• 5.2 Removing and installing bulb of front interior light
  225
• 5.3 Removing and installing centre interior light
  226
• 5.4 Removing and installing bulb of centre interior light
  227
• 6 Cigarette lighter and 12-V socket
  229
• 6.1 Removing and installing cigarette lighter U1
  229
• 6.2 Removing and installing 12-V socket
  229
• 7 Immobiliser
  237
• 7.1 Removing and installing immobiliser control unit
  237
• 7.2 Removing and installing immobiliser reader coil
  237
• 8 Anti-theft alarm system (ATAS)
  238
• 8.1 General description - anti-theft alarm system
  238
• 8.2 Assembly overview - anti-theft alarm system
  241
• 8.3 Removing and installing interior monitoring deactivation switch
  243
• 8.4 Removing and installing alarm horn H12
  244
• 8.5 Removing and installing anti-theft alarm sensor G578
  247
• 8.6 Adapting the anti-theft alarm system
  248
• Wiring
  251
• 1 Relay carriers, fuse holders, electronics boxes
  251
• 1.1 Overview of fitting locations - relay carriers, fuse holders, E-boxes
  251
• 1.2 Removing and installing relay carrier
  252
• 1.3 Removing and installing fuse holder
  255
• 1.4 Electric interface for external use
  258
• 2 Select Control units
  263
• 2.1 Removing and installing onboard supply control unit
  263
• 2.2 Flashing, commissioning and coding onboard supply control unit
  264
• 2.3 Removing and installing data bus diagnostic interface J533
  265
• 3 Connectors
  268
• 3.1 Repairing electrical wiring harnesses and plug-in connections
  268
• 4 Vehicle diagnosis, testing and information systems
  269