Electrical system

Kapitelübersicht

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety measures when working on vehicles with start/stop system
  1
• 1.3 Application notes and safety information for LED headlights
  1
• 2 Repair instructions
  2
• 2.1 Rules for cleanliness
  2
• 2.2 General information
  2
• 2.3 Contact corrosion
  2
• 2.4 ESD workplace
  2
• 2.5 Routing and attachment of lines
  3
• 3 Battery
  4
• 3.1 Battery - general notes
  4
• 3.2 Types of battery
  4
• Starter, current supply, CCS
  5
• 1 Battery
  5
• 1.1 Assembly overview - battery
  5
• 1.2 Removing and installing battery
  8
• 1.3 Disconnecting and connecting battery
  15
• 1.4 Removing and installing battery tray
  18
• 1.5 Checking battery
  20
• 1.6 Charging battery
  20
• 1.7 Removing and installing earth wire with battery monitor control unit J367
  21
• 1.8 Adapting battery monitor control unit J367
  23
• 2 Alternator
  24
• 2.1 Assembly overview - alternator
  24
• 2.2 Removing and installing alternator
  26
• 2.3 Checking alternator
  33
• 2.4 Removing and installing poly V-belt pulley
  34
• 2.5 Removing and installing voltage regulator
  42
• 3 Starter motor
  46
• 3.1 Assembly overview – starter
  46
• 3.2 Removing and installing starter
  48
• 4 Start/stop system
  56
• 4.1 General description - start/stop system
  56
• 4.2 Overview of fitting locations - start/stop system
  56
• 4.3 Removing and installing voltage stabiliser
  56
• Gauges, instruments
  59
• 1 Dash panel insert
  59
• 1.1 Assembly overview - dash panel insert
  59
• 1.2 Assembly overview - head-up display
  60
• 1.3 Removing and installing dash panel insert KX2
  61
• 1.4 Removing and installing control unit for head-up display
  66
• 2 Horn
  68
• 2.1 Assembly overview - horn
  68
• 2.2 Removing and installing treble horn H2 and bass horn H7
  68
• 2.3 Removing and installing bracket for horns
  69
• Windscreen wash/wipe system
  71
• 1 Windscreen wiper system
  71
• 1.1 Assembly overview - windscreen wiper system
  71
• 1.2 Moving wipers to service position
  74
• 1.3 Removing and installing wiper blade
  74
• 1.4 Removing and installing wiper arms
  75
• 1.5 Adjusting wiper arms
  76
• 1.6 Removing and installing wiper motor V
  78
• 1.7 Renewing wiper motor
  79
• 1.8 Deactivating APP function of wiper motor
  82
• 1.9 Removing and installing rain and light sensor
  82
• 2 Windscreen washer system
  87
• 2.1 Assembly overview - windscreen washer system
  87
• 2.2 Removing and installing washer fluid reservoir
  90
• 2.3 Removing and installing windscreen washer fluid level sender
  95
• 2.4 Removing and installing windscreen washer pump
  97
• 2.5 Removing and installing spray jets
  99
• 2.6 Adjusting spray jets
  100
• 3 Rear window wiper system
  101
• 3.1 Assembly overview - rear window wiper system
  101
• 3.2 Removing and installing wiper blade
  101
• 3.3 Removing and installing wiper arm
  102
• 3.4 Adjusting wiper arm
  103
• 3.5 Removing and installing rear window wiper motor V12
  104
• 4 Rear window washer system
  107
• 4.1 Assembly overview - rear window washer system
  107
• 4.2 Removing and installing washer fluid reservoir
  108
• 4.3 Removing and installing rear window washer pump
  109
• 4.4 Removing and installing spray jet
  109
• 4.5 Adjusting spray jet
  109
• 5 Washer fluid lines
  110
• 5.1 Repairing washer fluid lines
  110
• Lights, bulbs, switches - exterior
  111
• 1 Headlights
  111
• 1.1 Assembly overview - headlight
  111
• 1.2 Removing and installing headlight
  117
• 1.3 Adjusting headlights
  119
• 1.4 Adjusting headlight installation position
  120
• 1.5 Removing and installing front turn signal bulb M5/M7
  122
• 1.6 Installing repair kit for headlight housing
  123
• 1.7 Converting headlights from driving on right to driving on left
  125
• 1.8 Removing and installing headlight range control motor V48/V49
  125
• 1.9 Removing and installing dipped-beam headlight bulb
  130
• 1.10 Removing and installing headlight main beam bulb M30/M32
  133
• 1.12 Removing and installing daytime running light, only “GTE”
  137
• 1.13 Removing and installing headlight fan V407/V408
  138
• 1.14 Removing and installing output module 1 for LED headlight A27 / A31
  140
• 1.15 Removing and installing control motor sender for VARILIS headlight G695/G696
  143
• 1.16 Removing and installing control motor for VARILIS headlight V446/V447
  143
• 1.17 Removing and installing swivel module position sensor G474/G475
  143
• 1.18 Removing and installing dynamic cornering light control motor V318/V319
  144
• 2 Fog lights
  145
• 2.1 Assembly overview - fog lights
  145
• 2.2 Removing and installing fog light
  145
• 3 Lights in exterior mirror
  147
• 3.1 Assembly overview - lights in exterior mirror
  147
• 3.2 Removing and installing turn signal
  149
• 3.3 Removing and installing entry light in exterior mirror
  150
• 4 Tail lights
  151
• 4.1 Assembly overview - tail lights in body
  151
• 4.2 Assembly overview - tail lights in rear lid
  152
• 4.3 Removing and installing tail light in rear lid
  152
• 4.4 Removing and installing tail light cluster
  154
• 4.5 Adjusting installation position of tail light
  155
• 5 High-level brake light
  158
• 5.1 Assembly overview - high-level brake light
  158
• 5.2 Removing and installing high-level brake light
  159
• 6 Number plate light
  163
• 6.1 Removing and installing number plate light X4/X5
  163
• 7 Entry and start authorisation system
  166
• 7.1 Overview of fitting locations - entry and start authorisation system
  166
• 7.2 Overview of fitting locations - keyless entry system
  168
• 7.3 Removing and installing interface for entry and start system J965
  171
• 7.4 Removing and installing door exterior handle contact sensor G415/G416
  173
• 7.5 Removing and installing contact sensor for rear exterior door handle G417/G418
  173
• 7.6 Removing and installing interior aerial 1 for entry and start system R138
  173
• 7.7 Removing and installing interior aerial 2 for entry and start system R139
  174
• 7.8 Removing and installing driver side aerial for entry and start system R134
  175
• 7.10 Removing and installing rear bumper aerial for entry and start system R136
  176
• 7.12 Removing and installing rear entry and start authorisation aerial R165/R166
  177
• 7.13 Removing and installing rear lid power opening control unit J938
  177
• 7.14 Removing and installing rear lid power opening sender G750/G760
  178
• 8 Steering column switch module
  179
• 8.1 Assembly overview - steering column switch module
  179
• 8.2 Removing and installing steering column switch module
  181
• 8.3 Removing and installing steering column electronics control unit J527
  185
• 8.4 Removing and installing turn signal switch E2
  190
• 8.5 Removing and installing intermittent wiper switch E22
  192
• 8.6 Removing and installing immobiliser reader coil D2
  192
• 8.7 Removing and installing base for steering column combination switch
  193
• 9 Automatic headlight range control
  194
• 9.1 Assembly overview - automatic headlight range control
  194
• 9.2 Removing and installing cornering light and headlight range control unit J745
  196
• 10 Towing bracket
  199
• 10.1 Assembly overview - towing bracket socket
  199
• 10.2 Trailer socket U10
  199
• 10.3 Removing and installing trailer detector control unit J345
  200
• Lights, bulbs, switches - interior
  202
• 1 Lights
  203
• 1.1 Overview of fitting locations - lights in dash panel
  204
• 1.2 Overview of fitting locations - lights in front doors
  204
• 1.3 Overview of fitting locations - lights in rear doors
  205
• 1.4 Overview of fitting locations - lights in centre console
  206
• 1.5 Overview of fitting locations - lights in luggage compartment
  207
• 1.6 Overview of fitting locations - lights in roof trim
  209
• 1.7 Removing and installing glove compartment light W6
  211
• 1.8 Removing and installing front footwell light K268/K269
  212
• 1.9 Removing and installing Central locking SAFELOCK function warning lamp K133
  213
• 1.11 Removing and installing bulb for background lighting in front door 1 L203/L204
  215
• 1.12 Removing and installing front entry light W31/W32
  216
• 1.13 Removing and installing door warning lamp W30/W36
  218
• 1.14 Removing and installing bulb 1 for background lighting in rear door L201/L202
  218
• 1.15 Removing and installing rear entry light W33/W34
  219
• 1.16 Removing and installing rear door warning lamp W37/W38
  219
• 1.17 Removing and installing bulb for background lighting in front door 2 L199/L200
  219
• 1.18 Removing and installing bulb 2 for background lighting in rear door L166/L167
  220
• 1.19 Removing and installing interior door handle illumination bulb L146/L147
  220
• 1.20 Removing and installing light for rear interior door handle illumination L221/L222
  221
• 1.21 Removing and installing lights for dashboard ambient lighting L229/L230
  221
• 1.22 Removing and installing selector lever position display Y26
  221
• 1.23 Removing and installing illuminated vanity mirror W20/W14
  221
• 1.24 Removing and installing luggage compartment light W3
  222
• 1.25 Removing and installing bulb for rear interior light W43
  224
• 1.26 Removing and installing bulb for front reading light W13/W19
  224
• 1.27 Removing and installing bulb for rear reading light W11/W12
  224
• 1.28 Renewing bulb of rear interior light W47/W48
  225
• 2 Controls
  228
• 2.1 Overview of fitting locations - controls in dash panel
  229
• 2.2 Overview of fitting locations - controls in front doors
  231
• 2.3 Overview of fitting locations - controls in rear doors
  231
• 2.4 Overview of fitting locations - controls in centre console
  232
• 2.5 Overview of fitting locations - controls in luggage compartment
  233
• 2.6 Overview of fitting locations - controls in roof trim
  234
• 2.7 Removing and installing rotary light switch EX1
  235
• 2.8 Removing and installing headlight range control regulator E102
  237
• 2.9 Removing and installing rear roller blind switch E149
  237
• 2.10 Removing and installing TCS and ESP button E256
  237
• 2.11 Removing and installing steering wheel heater button E522
  238
• 2.12 Removing and installing sport program button E541
  238
• 2.13 Removing and installing button for electric drive E656
  238
• 2.14 Removing and installing Start/Stop operation button E693
  238
• 2.15 Removing and installing driving mode selection button E735
  239
• 2.16 Removing and installing switch module in centre console EX23/EX30
  239
• 2.17 Removing and installing bulb for front interior light W1
  241
• 2.18 Removing and installing Telematics button module E734
  243
• 2.19 Removing and installing hazard warning light switch EX3
  244
• 2.20 Removing and installing buttons for seat heating E653/E654
  245
• 2.21 Removing and installing glove compartment light switch E26
  245
• 2.22 Removing and installing exterior mirror adjuster EX11
  246
• 2.23 Removing and installing operating unit for window regulator in driver door E512
  246
• 2.24 Removing and installing front passenger side window regulator button E716
  247
• 2.26 Removing and installing rear lid remote release button E233
  249
• 2.28 Removing and installing door contact switch F2/F3
  251
• 2.29 Removing and installing rear window regulator button E711/E713
  251
• 2.30 Removing and installing rear door contact switches F10/F11
  252
• 2.32 Removing and installing starter button E378
  253
• 2.33 Removing and installing rear lid warning buzzer H32
  254
• 2.34 Removing and installing rear lid contact switch
  254
• 2.35 Removing and installing rear lid closure button E574
  254
• 2.36 Removing and installing electric hinged tow coupling attachment button E474
  256
• 2.37 Removing and installing vanity mirror contact switch F147/F148
  257
• 2.38 Removing and installing sunroof button E325
  257
• 2.39 Removing and installing front interior light WX1
  258
• 2.40 Removing and installing rear interior light WX2
  258
• 2.41 Removing and installing front reading light button E634/E633
  260
• 3 Anti-theft alarm
  261
• 3.1 Assembly overview - interior monitor
  261
• 3.2 Removing and installing alarm horn H12
  262
• 3.3 Removing and installing anti-theft alarm sensor G578
  263
• 4 Cigarette lighter, socket
  265
• 4.1 Assembly overview - DC/AC converter with socket, 12 V-230 V
  265
• 4.2 Removing and installing cigarette lighter U1
  266
• 4.3 Removing and installing socket illumination bulb L42
  266
• 4.4 Removing and installing rear cigarette lighter illumination bulb L32
  266
• 4.5 Removing and installing electric socket U
  266
• 4.6 Removing and installing DC/AC converter with socket, 12 V-230 V U13
  266
• Wiring
  269
• 1 Relay carriers, fuse holders, electronics boxes
  269
• 1.1 Overview of fitting locations - relay carriers, fuse holders, E-boxes
  269
• 1.2 Removing and installing electronics box (E-box)
  274
• 1.3 Removing and installing relay and fuse holder in electronics box
  277
• 1.4 Removing and installing relay and fuse carrier behind dash panel
  279
• 1.5 Removing and installing main fuse holder
  281
• 2 Select Control units
  286
• 2.1 Overview of fitting locations - control units
  286
• 2.2 Assembly overview - control units
  287
• 2.3 Assembly overview - data bus diagnostic interface
  289
• 2.4 Assembly overview - special vehicle control unit and voltage stabiliser
  290
• 2.5 Removing and installing onboard supply control unit J519
  291
• 2.6 Removing and installing data bus diagnostic interface J533
  295
• 2.7 Removing and installing bracket for onboard supply control unit J519
  296
• 2.8 Renewing bracket for onboard supply control unit J519
  299
• 2.9 Removing and installing rear lid control unit J605
  300
• 2.10 Removing and installing special vehicle control unit J608
  302
• 2.11 Removing and installing bracket for special vehicle control unit J608
  303
• 3 Connectors
  305
• 3.1 Repairing electrical wiring harnesses and plug-in connections
  305
• 4 Releasing and dismantling connector housings
  306
• 5 Repairing aerial wires
  307
• 6 Fibre optic cables
  308
• 7 Vehicle diagnosis, testing and information systems
  309