Electrical system

Chapter overview

• Starter, current supply, CCS
  1
• 1 Safety information and repair notes
  1
• 1.1 Safety information
  1
• 1.2 Repair notes
  1
• 2 Battery
  2
• 2.1 Assembly overview – battery
  2
• 2.2 Removing and installing battery A
  3
• 2.3 Disconnecting and connecting battery
  7
• 2.4 Removing and installing battery tray
  10
• 2.5 Checking battery A
  10
• 2.6 Charging battery A
  16
• 2.7 Removing and installing earth wire with battery monitor control unit [J367]
  17
• 2.8 Adapting battery monitor control unit [J367]
  17
• Gauges, instruments
  19
• 1 Safety information and repair notes
  19
• 1.1 Safety information
  19
• 1.2 Repair notes
  19
• 2 Dash panel insert
  20
• 2.1 Assembly overview – control unit with display unit for driver information system
  20
• 2.2 Assembly overview – head-up display
  20
• 2.4 Removing and installing control unit for head-up display [J898]
  22
• 2.5 Calibrating control unit for head-up display [J898]
  24
• 3 Horn
  28
• 3.1 Assembly overview – horn
  28
• 3.2 Removing and installing horn or dual tone horn [H1]
  28
• Windscreen wash/wipe system
  30
• 1 Safety information and repair notes
  30
• 1.1 Safety information
  30
• 1.2 Repair notes
  30
• 2 Windscreen wiper system
  31
• 2.1 Assembly overview - windscreen wiper system
  31
• 2.2 Moving wipers to service position
  32
• 2.3 Removing and installing wiper blade
  32
• 2.4 Removing and installing wiper arms
  33
• 2.5 Adjusting wiper arms
  35
• 2.6 Removing and installing wiper motor [V]
  37
• 2.7 Coding wiper motor
  37
• 2.8 Removing and installing rain and light sensor [G397]
  38
• 3 Windscreen washer system
  40
• 3.1 Assembly overview – windscreen washer system
  40
• 3.2 Removing and installing washer fluid reservoir
  41
• 3.3 Removing and installing washer pump [V59]
  42
• 3.4 Removing and installing spray jets
  43
• 3.5 Adjusting spray jets
  44
• 4 Rear window wiper system
  45
• 4.1 Assembly overview – rear window wiper system
  45
• 4.2 Removing and installing wiper blade
  45
• 4.3 Removing and installing wiper arm
  46
• 4.4 Adjusting wiper arm
  47
• 4.5 Removing and installing rear window wiper motor [V12]
  48
• 5 Rear window washer system
  50
• 5.1 Assembly overview – rear window washer system
  50
• 5.2 Removing and installing spray jet
  50
• 6 Washer fluid lines
  53
• 6.1 Repairing washer fluid lines
  53
• Lights, bulbs, switches - exterior
  55
• 1 Safety information and repair notes
  55
• 1.1 Safety information
  55
• 1.2 Repair notes
  55
• 2 Headlights
  56
• 2.1 Assembly overview – headlight
  56
• 2.2 Assembly overview – repair kit for headlight housing
  60
• 2.3 Assembly overview – LED module for daytime running light
  61
• 2.4 Removing and installing headlight
  62
• 2.5 Adjusting headlights
  63
• 2.6 Removing and installing front turn signal bulb [M5]/[M7]
  63
• 2.7 Installing repair kit for headlight housing
  65
• 2.8 Removing and installing headlight range control motor [V48]/[V49]
  66
• 2.10 Removing and installing bulb for VARILIS headlight [L207]/[L208]
  71
• 2.11 Removing and installing headlight fan [V407]/[V408]
  74
• 2.12 Removing and installing output module 1 for LED headlight [A27]/[A31]
  76
• 2.14 Removing and installing LED module for daytime running lights [L377]/[L378]
  79
• 3 Lights in exterior mirror
  81
• 3.1 Assembly overview - lights in exterior mirror
  81
• 3.2 Removing and installing turn signal repeater bulb [L131]/[L132]
  83
• 3.3 Removing and installing entry light in exterior mirror [W52]/[W53]
  84
• 4 Tail lights
  86
• 4.1 Assembly overview – tail lights in body
  86
• 4.2 Assembly overview – tail lights in rear lid
  86
• 4.3 Removing and installing centre rear tail light cluster [MX13]
  87
• 4.4 Removing and installing tail light cluster [MX3]/[MX4]
  88
• 4.5 Removing and installing rear fog light [X3]
  89
• 5 LED module for charging socket
  91
• 5.1 Removing and installing LED module for charging socket 1 [L263]
  91
• 6 High-level brake light
  92
• 6.1 Assembly overview – high-level brake light
  92
• 6.2 Removing and installing high-level brake light bulb [M25]
  92
• 7 Number plate light
  94
• 7.1 Removing and installing number plate light [X4]/[X5]
  94
• 8 Entry and start authorisation system
  95
• 8.1 Overview of fitting locations – entry and start authorisation system
  95
• 8.2 Overview of fitting locations – keyless entry system
  98
• 8.3 Assembly overview – control unit for break-in protection
  99
• 8.4 Removing and installing interface for entry and start system [J965]
  100
• 8.5 Removing and installing entry and start authorisation aerial [R200]/[R201]
  102
• 8.6 Removing and installing interior aerial 1 for entry and start system [R138]
  103
• 9 Steering column switch module
  106
• 9.1 Assembly overview – steering column electronics control unit
  106
• 9.2 Removing and installing steering column electronics control unit [J527]
  106
• 10 Automatic headlight range control
  109
• 10.1 Assembly overview - automatic headlight range control
  109
• 11 Towing bracket
  110
• 11.1 Assembly overview – socket, trailer detector control unit
  110
• 11.2 Removing and installing trailer detector control unit [J345]
  110
• 11.3 Removing and installing trailer socket [U10]
  111
• Lights, bulbs, switches - interior
  113
• 1 Safety information and repair notes
  113
• 1.1 Safety information
  113
• 1.2 Repair notes
  113
• 2 Lights
  114
• 2.1 Overview of fitting locations - lights in dash panel
  114
• 2.2 Overview of fitting locations - lights in front doors
  114
• 2.3 Overview of fitting locations – footwell lights
  115
• 2.4 Overview of fitting locations – lights in centre console
  116
• 2.5 Overview of fitting locations – lights in luggage compartment
  117
• 2.6 Overview of fitting locations – lights in roof trim
  118
• 2.7 Removing and installing footwell light [W9]/[W10]
  120
• 2.8 Removing and installing central locking SAFELOCK function warning lamp [K133]
  121
• 2.9 Removing and installing rear footwell light [W45]/[W46]
  122
• 2.10 Removing and installing luggage compartment light [W18]/[W35]
  123
• 2.11 Removing and installing illuminated vanity mirror [W20]/[W14]
  123
• 2.12 Removing and installing dynamic light strip 1 for information in dash panel [L385]
  124
• 2.13 Removing and installing light 1 for front centre console background lighting [L193]
  125
• 3 Controls
  127
• 3.1 Overview of fitting locations - controls in dash panel
  127
• 3.2 Overview of fitting locations – controls in front doors
  128
• 3.3 Overview of fitting locations – controls in rear doors
  128
• 3.4 Overview of fitting locations - controls in luggage compartment
  129
• 3.5 Overview of fitting locations – controls in roof trim
  130
• 3.6 Removing and installing operating unit for lighting [EX59]
  132
• 3.7 Removing and installing centre switch module in dash panel [EX22]
  133
• 3.8 Removing and installing operating unit for window regulator in driver door [EX36]
  133
• 3.9 Removing and installing front passenger side window regulator button [E716]
  134
• 3.10 Removing and installing rear lid remote release button [E233]
  135
• 3.11 Removing and installing rear window regulator [E711]/[E713]
  136
• 3.12 Removing and installing starter button [E378]
  136
• 3.13 Removing and installing electric hinged tow coupling attachment button [E474]
  137
• 3.14 Removing and installing rear lid closure button [E574]
  138
• 3.15 Removing and installing rear lid warning buzzer [H32]
  138
• 3.16 Removing and installing front interior light [WX1]
  139
• 3.17 Removing and installing rear interior light/reading light
  140
• 4 Anti-theft alarm system
  142
• 4.1 Assembly overview – interior monitor
  142
• 4.2 Removing and installing alarm horn [H12]
  143
• 4.3 Removing and installing anti-theft alarm sensor [G578]
  144
• 5 Cigarette lighter, socket
  146
• 5.1 Removing and installing 12 V socket U5/U19
  146
• Wiring
  147
• 1 Safety information and repair notes
  147
• 1.1 Safety information
  147
• 1.2 Repair notes
  147
• 2 Relay carriers, fuse holders, electronics boxes
  148
• 2.1 Overview of fitting locations – relay carriers, fuse holders, E-boxes
  148
• 2.2 Assembly overview – relay carriers, fuse holders, electronics boxes
  149
• 2.3 Removing and installing electronics box
  151
• 2.4 Removing and installing fuse holder A [SA]
  152
• 2.5 Removing and installing fuse holder B [SB]
  154
• 2.6 Removing and installing fuse holder C [SC]
  156
• 2.7 Removing and installing bracket for fuse holder C [SC]
  158
• 3 Control units
  160
• 3.1 Overview of fitting locations – control units
  160
• 3.2 Assembly overview – onboard supply control unit
  161
• 3.3 Removing and installing onboard supply control unit [J519]
  163
• 3.4 Removing and installing bracket for onboard supply control unit [J519]
  165
• 3.5 Removing and installing data bus diagnostic interface [J533]
  167
• 3.6 Removing and installing fan for control unit [V274]
  168
• 4 Repairing wiring harnesses
  170
• 4.1 Repairing a 0.13 mm²/0.35 mm²/0.5 mm² wire
  170
• 4.2 Repairing a 10 mm² or 16 mm² wire
  173
• 4.3 Repairing 2.5 mm, 4 mm or 6 mm aluminium wire with a single crimp connector
  177
• 5 Cleaning contact surfaces
  181
• 5.1 Cleaning cable lugs
  181
• 5.2 Cleaning threaded connections
  182
• 5.3 Cleaning battery clamp and battery terminal
  182
• 5.4 Anti-corrosion treatment of contact surfaces
  184
• 6 Repairing aerial wires
  185
• 6.1 Repairing aerial wires
  185
• 7 Fibre optic cables
  190
• 7.1 Removing and installing fibre optic cable of wiring harness connector
  190
• 7.2 Repairing fibre optic cables
  191