Electrical system

Chapter overview

• Starter, current supply, CCS
  1
• 1 Battery
  1
• 1.1 Types of battery
  1
• 1.2 Battery - general notes
  1
• 1.3 Assembly overview - battery
  2
• 1.4 Removing and installing battery
  4
• 1.5 Disconnecting and reconnecting battery
  7
• 1.6 Removing and installing battery tray
  11
• 1.7 Checking battery
  12
• 1.8 Charging battery
  12
• 1.9 Removing and installing earth wire with battery monitor control unit J367
  12
• 2 Alternator
  16
• 2.1 Assembly overview - alternator
  16
• 2.2 Removing and installing alternator
  26
• 2.3 Checking alternator
  49
• 2.4 Checking poly V-belt
  49
• 2.5 Removing and installing poly V-belt pulley
  49
• 2.6 Removing and installing voltage regulator
  55
• 3 Starter
  58
• 3.1 Assembly overview - starter
  58
• 3.2 Removing and installing starter
  61
• 3.3 Checking starter
  102
• 4 Cruise control system (CCS)
  103
• 5 Start/Stop system
  104
• 5.1 Safety precautions when working on vehicles with start/stop system
  104
• 5.2 General description - start/stop system
  104
• 5.3 Removing and installing voltage stabiliser
  106
• Gauges, instruments
  108
• 1 Dash panel insert
  108
• 1.1 Assembly overview - dash panel insert
  108
• 1.2 Removing and installing dash panel insert
  113
• 1.3 Multi-pin connector pin assignment on dash panel insert
  114
• 1.4 Removing and installing ambient temperature sensor G17
  114
• 2 Horn
  116
• 2.1 Assembly overview - horn
  116
• 2.2 Removing and installing horn
  116
• Windscreen wash/wipe system
  118
• 1 Windscreen wiper system
  118
• 1.1 Assembly overview - windscreen wiper system
  118
• 1.2 Moving wipers to service position
  119
• 1.3 Removing and installing wiper blade
  119
• 1.4 Removing and installing windscreen wiper arms
  120
• 1.5 Adjusting windscreen wiper arms
  121
• 1.6 Removing and installing windscreen wiper motor V
  123
• 1.7 Removing and installing rain and light sensor G397
  125
• 2 Windscreen washer system
  129
• 2.1 Assembly overview - windscreen washer system
  129
• 2.2 Removing and installing washer fluid reservoir
  130
• 2.3 Removing and installing windscreen washer fluid level sender G33
  131
• 2.4 Removing and installing windscreen washer pump V5
  132
• 2.5 Removing and installing washer jets
  133
• 2.6 Adjusting spray jets
  133
• 3 Headlight washer system
  134
• 3.1 Assembly overview - headlight washer system
  134
• 3.2 Removing and installing headlight washer system pump V11
  134
• 3.3 Removing and installing washer jets
  135
• 3.4 Adjusting spray jets
  136
• 3.5 Removing and installing pop-up cylinder
  136
• 4 Washer fluid lines
  138
• 4.1 Repairing washer fluid lines
  138
• Lights, bulbs, switches - exterior
  139
• 1 Headlight
  139
• 1.1 Operation and safety notes for gas discharge bulbs
  139
• 1.2 Assembly overview - headlight
  142
• 1.3 Removing and installing headlight
  146
• 1.4 Adjusting headlights
  147
• 1.5 Adjusting headlight installation position
  148
• 1.6 Removing and installing front turn signal bulb
  149
• 1.7 Installing repair kit for headlight housing
  151
• 1.8 Changing headlights over from driving on right to driving on left
  155
• 1.9 Changing headlights over from driving on left to driving on right
  156
• 1.10 Removing and installing headlight range control actuator
  157
• 1.11 Renewing headlight dipped beam bulb
  159
• 1.12 Renewing headlight main beam bulb
  159
• 1.13 Removing and installing gas discharge bulb
  160
• 1.14 Removing and installing bulb for daytime running light/side light
  162
• 1.15 Removing and installing daytime running light
  164
• 1.16 Removing and installing headlight screen adjustment solenoid
  165
• 1.17 Removing and installing swivel module position sensor
  165
• 1.18 Removing and installing static cornering light bulb
  166
• 1.19 Removing and installing gas discharge bulb control unit
  167
• 1.20 Removing and installing power output module for headlight
  168
• 2 Fog lights
  170
• 2.1 Assembly overview - fog lights
  170
• 2.2 Removing and installing fog light
  171
• 2.3 Removing and installing fog light bulb
  173
• 2.4 Adjusting fog lights
  174
• 3 Side marker light
  175
• 3.1 Removing and installing side marker light bulb
  175
• 4 Lights in exterior mirror
  177
• 4.1 Assembly overview - lights in exterior mirror
  177
• 4.2 Removing and installing turn signal repeater bulb
  177
• 4.3 Removing and installing entry light in exterior mirror
  178
• 5 Tail lights
  179
• 5.1 Assembly overview - tail lights in body
  179
• 5.2 Assembly overview - tail lights in rear lid
  182
• 5.3 Removing and installing bulb carrier
  183
• 5.4 Removing and installing tail light in rear lid
  184
• 5.5 Removing and installing tail light in body
  185
• 5.6 Removing and installing tail light bulb
  185
• 5.7 Removing and installing rear fog light bulb
  186
• 5.8 Removing and installing bulb for brake light and tail light
  186
• 5.9 Removing and installing reversing light bulb
  187
• 5.10 Removing and installing turn signal bulb
  188
• 6 High-level brake light
  190
• 6.1 Assembly overview - high-level brake light
  190
• 6.2 Removing and installing high-level brake light
  190
• 6.3 Removing and installing high-level brake light bulb M25
  191
• 7 Number plate light
  192
• 7.1 Removing and installing number plate light
  192
• 8 Entry and start authorisation
  193
• 8.1 Assembly overview - entry and start authorisation system
  193
• 8.2 Removing and installing entry and start authorisation control unit J518
  195
• 8.3 Removing and installing interior aerial for entry and start authorisation
  198
• 8.5 Removing and installing driver side aerial for entry and start authorisation
  199
• 8.6 Removing and installing luggage compartment aerial for entry and start authorisation R137
  200
• 8.7 Removing and installing rear bumper aerial for entry and start authorisation R136
  200
• 8.8 Checking entry and start system aerials and sensors
  201
• 8.9 Removing and installing entry and start authorisation switch
  204
• 9 Steering column switch module
  205
• 9.1 Assembly overview - steering column switch module
  205
• 9.2 Removing and installing steering column electronics control unit J527
  209
• 9.3 Removing and installing steering column combination switch E595
  212
• 9.4 Removing and installing steering column switch base
  221
• 9.5 Removing and installing electronic steering column lock control unit J764
  229
• 9.6 Removing and installing ignition/starter switch D
  231
• 9.7 Removing and installing ignition key withdrawal lock solenoid N376
  234
• 10 Parking aid
  236
• 10.1 Assembly overview - parking aid
  236
• 10.2 Removing and installing parking aid control unit J446
  239
• 10.3 Removing and installing front parking aid warning buzzer H22
  241
• 10.4 Removing and installing rear parking aid warning buzzer H15
  243
• 10.5 Removing and installing front parking aid senders
  244
• 10.6 Removing and installing rear parking aid senders
  248
• 11 Main beam assist
  253
• 11.1 Overview - main beam assist
  253
• 11.2 Overview of fitting locations - main beam assist
  253
• 11.3 Removing and installing main beam assist control unit J844
  254
• 11.4 Renewing main beam assist control unit J844
  255
• 11.5 Coding main beam assist control unit J844
  255
• 11.6 Removing and installing light sensor G399
  255
• 12 Automatic headlight range control
  257
• 12.1 Assembly overview - automatic headlight range control
  257
• 13 Towing bracket
  260
• 13.1 Assembly overview - towing bracket socket
  260
• 13.2 Removing and installing trailer detector control unit J345
  260
• 13.3 Removing and installing trailer socket U10
  261
• Lights, bulbs, switches - interior
  263
• 1 Lights
  263
• 1.1 Overview of fitting locations - lights in dash panel
  263
• 1.2 Overview of fitting locations - lights in luggage compartment
  265
• 1.3 Overview of fitting locations - lights in roof trim
  266
• 1.4 Removing and installing glove compartment light W6
  266
• 1.5 Removing and installing central locking SAFELOCK function warning lamp K133
  268
• 1.6 Removing and installing luggage compartment light W3
  269
• 1.7 Removing and installing illuminated vanity mirrors
  270
• 1.8 Renewing bulb of front interior light W1
  271
• 1.9 Removing and installing centre reading lights
  273
• 1.10 Replacing bulb of rear interior light W43
  273
• 2 Controls
  276
• 2.1 Overview of fitting locations - controls in dash panel
  277
• 2.2 Overview of fitting locations - controls in front doors
  278
• 2.3 Fitting locations overview - controls in rear doors
  279
• 2.4 Fitting locations overview - controls in centre console
  280
• 2.5 Fitting locations overview - controls in roof trim
  281
• 2.6 Removing and installing light switch E1
  281
• 2.7 Removing and installing regulator for switch and instrument illumination E20
  283
• 2.8 Removing and installing key-operated switch to deactivate front passenger side airbag E224
  284
• 2.9 Removing and installing tyre pressure monitor display button E492
  285
• 2.10 Removing and installing rear central switch for interior locking E286
  285
• 2.11 Removing and installing driver side interior locking button for central locking system E308
  286
• 2.13 Removing and installing remote release button for fuel filler flap and rear lid E463
  288
• 2.14 Removing and installing start/stop operating mode switch E693
  289
• 2.15 Removing and installing TCS and ESP button E256
  290
• 2.16 Removing and installing parking aid button E266
  291
• 2.17 Removing and installing the starter button E378
  293
• 2.18 Removing and installing button for electric drive E656 , high-voltage vehicle
  294
• 2.19 Removing and installing warning lamp for airbag deactivated on front passenger side K145
  295
• 2.20 Removing and installing hazard warning light button E229
  296
• 2.21 Removing and installing glove compartment light switch E26
  297
• 2.22 Removing and installing mirror adjustment switch E43
  297
• 2.23 Removing and installing operating unit for window regulator in driver door E512
  298
• 2.24 Removing and installing window regulator switch in front passenger door E107
  299
• 2.25 Removing and installing interior monitoring deactivation switch E267
  301
• 2.26 Removing and installing rear window regulator switch in door
  302
• 2.27 Removing and installing rear lid contact switch
  303
• 2.28 Removing and installing button 1 for tilting roof E582
  303
• 2.29 Removing and installing front interior light/reading light
  304
• 2.30 Removing and installing rear interior light/reading light
  306
• 2.31 Removing and installing garage door operating unit E284
  307
• 3 Immobiliser
  309
• 3.1 Overview - immobiliser
  309
• 3.2 Immobiliser control unit J362
  310
• 3.3 Immobiliser reader coil D2
  311
• 3.4 Ignition key
  311
• 4 Anti-theft alarm system
  313
• 4.1 Assembly overview - interior monitor
  313
• 4.2 Activating and deactivating anti-theft alarm system
  314
• 4.3 Central locking and anti-theft alarm system aerial R47
  315
• 4.4 Removing and installing alarm horn H12
  315
• 4.5 Removing and installing interior monitoring sensor G273
  316
• 4.6 Removing and installing bonnet contact switch F266
  316
• 4.7 Adaptations of anti-theft alarm system
  316
• 5 Cigarette lighter, socket
  318
• 5.1 Removing and installing AC/DC converter with socket
  318
• Wiring
  321
• 1 Relay carriers, fuse holders, electronics boxes
  321
• 1.1 Fitting locations overview - relay carriers, fuse holders, electronics boxes
  321
• 1.2 Removing and installing electronics box (E-box)
  322
• 1.3 Removing and installing relay and fuse holder in electronics box
  323
• 1.4 Removing and installing relay and fuse holder behind dash panel on driver side
  324
• 1.5 Removing and installing fuse holder on battery A , high-voltage vehicle
  326
• 2 Control units
  327
• 2.1 Fitting locations overview - control units
  327
• 2.2 Removing and installing onboard supply control unit J519
  328
• 2.3 Removing and installing data bus diagnostic interface J533
  335
• 2.4 Removing and installing garage door operation control unit J530
  338
• 3 Connectors
  339
• 3.1 Separating left door connector
  339
• 3.2 Separating right door connector
  340
• 3.3 Repairing electrical wiring harnesses and plug-in connections
  340
• 4 Vehicle diagnostic, testing and information systems
  341