Electrical system

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety measures when working on vehicles with a start/stop system
  1
• 1.3 Operation and safety notes for gas discharge lamps
  2
• 2 Repair instructions
  4
• 2.1 Contact corrosion
  4
• 2.2 Routing and attachment of lines
  4
• 3 Battery
  5
• 3.1 Battery - general notes
  5
• 3.2 Types of battery
  5
• Starter, current supply, CCS
  6
• 1 Battery
  6
• 1.1 Assembly overview - battery
  6
• 1.2 Removing and installing battery
  7
• 1.3 Disconnecting and connecting battery
  10
• 1.4 Removing and installing battery tray
  12
• 1.5 Checking battery
  13
• 1.6 Charging battery
  13
• 1.7 Removing and installing earth wire with battery monitor control unit J367
  13
• 1.8 Adapting battery monitor control unit J367
  14
• 2 Alternator
  15
• 2.1 Assembly overview - alternator
  15
• 2.2 Removing and installing alternator
  16
• 2.3 Checking alternator
  26
• 2.4 Removing and installing poly V-belt pulley
  26
• 2.5 Removing and installing voltage regulator
  36
• 3 Starter motor
  39
• 3.1 Assembly overview – starter
  39
• 3.2 Removing and installing starter
  42
• 3.3 Checking starter
  52
• 4 Cruise control system (CCS)
  53
• 5 Start/stop system
  54
• 5.1 General description - start/stop system
  54
• 5.2 Removing and installing voltage stabiliser
  54
• Gauges, instruments
  56
• 1 Dash panel insert
  56
• 1.1 Assembly overview - dash panel insert
  56
• 1.2 Removing and installing dash panel insert KX2
  56
• 1.3 Multi-pin connector pin assignment on dash panel insert
  58
• 1.4 Removing and installing ambient temperature sensor
  58
• 2 Horn
  60
• 2.1 Assembly overview - horn
  60
• 2.2 Removing and installing treble horn H2 and bass horn H7
  60
• 3 Additional instruments
  62
• 3.1 Assembly overview - additional instruments
  62
• 3.2 Removing and installing additional instruments
  62
• Windscreen wash/wipe system
  64
• 1 Windscreen wiper system
  64
• 1.1 Assembly overview - windscreen wiper system
  64
• 1.2 Moving wipers to service position
  65
• 1.3 Removing and installing wiper blade
  65
• 1.4 Removing and installing wiper arms
  66
• 1.5 Adjusting wiper arms
  67
• 1.6 Removing and installing wiper motor V
  69
• 1.7 Renewing wiper motor
  70
• 1.8 Removing and installing rain and light sensor
  73
• 1.9 Repairing rain and light sensor
  75
• 2 Windscreen washer system
  77
• 2.1 Assembly overview - windscreen washer system
  77
• 2.2 Removing and installing washer fluid reservoir
  77
• 2.3 Removing and installing windscreen washer fluid level sender
  80
• 2.4 Removing and installing windscreen washer pump
  80
• 2.5 Removing and installing spray jets
  81
• 2.6 Adjusting spray jets
  82
• 3 Washer fluid lines
  83
• 3.1 Repairing washer fluid lines
  83
• Lights, bulbs, switches - exterior
  84
• 1 Headlights
  84
• 1.1 Assembly overview - headlight
  84
• 1.2 Removing and installing headlight
  87
• 1.3 Removing and installing carrier plate for headlights
  88
• 1.4 Adjusting headlights
  90
• 1.5 Adjusting headlight installation position
  90
• 1.6 Converting headlights from driving on right to driving on left
  91
• 1.7 Converting headlights from driving on left to driving on right
  92
• 1.8 Removing and installing headlight range control motor V48/V49
  92
• 1.9 Removing and installing dipped-beam headlight bulb
  95
• 1.10 Removing and installing headlight main beam bulb M30/M32
  97
• 1.11 Removing and installing gas discharge bulb L13/L14
  97
• 1.12 Removing and installing side light bulb M1/M3
  99
• 1.13 Removing and installing daytime running light bulb L174/L175
  100
• 1.15 Removing and installing gas discharge bulb control unit J343/J344
  101
• 2 Fog lights
  103
• 2.1 Assembly overview - fog lights
  103
• 2.2 Removing and installing fog light
  103
• 2.3 Removing and installing fog light bulb L22/L23
  105
• 2.4 Adjusting fog lights
  105
• 3 Side marker light
  106
• 3.1 Removing and installing front side marker light
  106
• 3.2 Removing and installing side marking light bulb
  107
• 4 Lights in exterior mirror
  108
• 4.1 Assembly overview - lights in exterior mirror
  108
• 4.2 Removing and installing turn signal
  108
• 4.3 Removing and installing turn signal repeater bulb L131/L132
  109
• 5 Front turn signals
  110
• 5.1 Assembly overview - front turn signals
  110
• 5.2 Removing and installing front turn signal
  110
• 5.3 Removing and installing front turn signal bulb
  111
• 6 Tail lights
  113
• 6.1 Assembly overview - tail lights in body
  113
• 6.2 Removing and installing bulb carrier
  115
• 6.3 Removing and installing tail light cluster
  116
• 6.4 Removing and installing rear fog light
  116
• 6.5 Removing and installing rear fog light bulb L46/L47
  118
• 6.6 Removing and installing brake and tail light bulb M21/M22
  118
• 6.7 Removing and installing reversing light bulb
  119
• 6.8 Removing and installing turn signal bulb
  120
• 7 High-level brake light
  122
• 7.1 Removing and installing high-level brake light
  122
• 8 Number plate light
  125
• 8.1 Removing and installing number plate light X4/X5
  125
• 8.2 Removing and installing bulb for number plate light X4/X5
  125
• 9 Entry and start authorisation system
  127
• 9.1 Overview of fitting locations - entry and start authorisation system
  127
• 9.2 Removing and installing entry and start authorisation control unit J518
  129
• 9.3 Removing and installing door exterior handle contact sensor G415/G416
  131
• 9.4 Removing and installing interior aerial 1 for entry and start authorisation R138
  131
• 9.5 Removing and installing interior aerial 2 for entry and start authorisation R139
  132
• 9.6 Removing and installing driver side aerial for entry and start system R134
  132
• 9.9 Removing and installing rear bumper aerial for entry and start system R136
  133
• 10 Steering column switch module
  135
• 10.1 Assembly overview - steering column switch module
  135
• 10.2 Removing and installing lock cylinder
  137
• 10.3 Removing and installing ignition key withdrawal lock solenoid N376
  140
• 10.4 Removing and installing ignition/starter switch
  140
• 10.5 Removing and installing steering column switch module
  142
• 10.6 Removing and installing steering column electronics control unit J527
  145
• 10.7 Removing and installing turn signal switch E2
  147
• 10.8 Removing and installing cruise control system switch E45
  149
• 10.9 Removing and installing intermittent wiper switch E22
  149
• 10.10 Removing and installing base for steering column combination switch
  150
• 10.11 Removing and installing steering lock housing
  150
• 11 Parking aid
  153
• 11.1 Assembly overview – parking aid
  153
• 11.2 Removing and installing parking aid control unit J446
  154
• 11.3 Removing and installing front parking aid warning buzzer H22
  155
• 11.4 Removing and installing rear parking aid warning buzzer H15
  156
• 11.5 Removing and installing front parking aid senders
  157
• 11.6 Removing and installing rear parking aid senders
  159
• 11.7 Renewing parking aid senders
  162
• 12 Blind Spot Monitor
  163
• 12.1 Assembly overview - Blind Spot Monitor
  163
• 12.2 Removing and installing warning lamp for Blind Spot Monitor K303/K304
  163
• 12.3 Removing and installing Blind Spot Monitor control unit J1086/J1087
  164
• 12.4 Calibrating Blind Spot Monitor
  165
• Lights, bulbs, switches - interior
  173
• 1 Lights
  173
• 1.1 Overview of fitting locations - lights in luggage compartment
  173
• 1.2 Overview of fitting locations - lights in roof trim
  174
• 1.3 Removing and installing footwell light W9/W10
  174
• 1.4 Removing and installing front footwell illumination bulb L151/L152
  175
• 1.5 Removing and installing Central locking SAFELOCK function warning lamp K133
  176
• 1.6 Removing and installing luggage compartment light W3
  177
• 1.7 Removing and installing illuminated vanity mirror W20/W14
  179
• 1.8 Renewing front interior light bulb W1/W13/W19
  181
• 2 Controls
  182
• 2.1 Overview of fitting locations - controls in dash panel
  182
• 2.2 Overview of fitting locations - controls in front doors
  183
• 2.3 Overview of fitting locations - controls in centre console
  184
• 2.4 Overview of fitting locations - controls in roof trim
  185
• 2.5 Removing and installing rotary light switch EX1
  186
• 2.6 Removing and installing regulator for switch and instrument illumination E20
  187
• 2.7 Removing and installing headlight range control regulator E102
  188
• 2.8 Removing and installing Start/Stop operation button E693
  188
• 2.9 Removing and installing parking aid button E266
  189
• 2.11 Removing and installing hazard warning lights button E229
  191
• 2.12 Removing and installing exterior mirror adjuster EX11
  192
• 2.13 Removing and installing operating unit for window regulator in driver door E512
  193
• 2.14 Removing and installing window regulator switch in front passenger door E107
  194
• 2.17 Removing and installing rear lid remote release button E233
  198
• 2.18 Removing and installing tyre pressure monitor display button E492
  198
• 2.19 Removing and installing door contact switch F2/F3
  199
• 2.20 Removing and installing starter button E378
  199
• 2.21 Removing and installing button 1 for tilting roof E582
  200
• 2.22 Removing and installing front interior light/reading light
  200
• 2.23 Removing and installing garage door operating unit E284
  204
• 2.24 Removing and installing interior monitoring deactivation switch E267
  204
• 3 Anti-theft alarm
  206
• 3.1 Assembly overview - interior monitor
  206
• 3.2 Removing and installing alarm horn H12
  208
• 3.3 Activating and deactivating anti-theft alarm
  208
• 3.4 Removing and installing interior monitoring sensor G273
  209
• 4 Immobiliser
  210
• 4.1 Removing and installing immobiliser control unit
  210
• 4.2 Removing and installing immobiliser reader coil
  210
• Wiring
  212
• 1 Relay carriers, fuse holders, electronics boxes
  212
• 1.1 Overview of fitting locations - relay carriers, fuse holders, E-boxes
  212
• 1.2 Removing and installing electronics box (E-box)
  213
• 1.3 Removing and installing relay and fuse holder in electronics box
  215
• 1.4 Removing and installing relay and fuse holder behind dash panel on driver side
  217
• 2 Select Control units
  219
• 2.1 Overview of fitting locations - control units
  219
• 2.2 Removing and installing onboard supply control unit J519
  220
• 2.3 Removing and installing converter box J935
  220
• 2.4 Removing and installing garage door operation control unit
  221
• 2.5 Removing and installing data bus diagnostic interface J533
  221
• 3 Connectors
  222
• 3.1 Repairing electrical wiring harnesses and plug-in connections
  222
• 4 Releasing and dismantling connector housings
  223
• 5 Repairing aerial wires
  224
• 6 Vehicle diagnosis, testing and information systems
  225