Electrical system

Kapitelübersicht

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety measures when working on vehicles with a start/stop system
  1
• 2 Repair instructions
  2
• 2.1 Contact corrosion
  2
• 2.2 Routing and attachment of lines
  2
• 3 Battery
  3
• 3.1 Battery - general notes
  3
• 3.2 Types of battery
  3
• Starter, current supply, CCS
  4
• 1 Battery
  4
• 1.1 Assembly overview - battery
  4
• 1.2 Removing and installing battery
  6
• 1.3 Disconnecting and connecting battery
  7
• 1.4 Removing and installing battery tray
  9
• 1.5 Checking battery
  10
• 1.6 Charging battery
  10
• 1.7 Removing and installing earth wire with battery monitor control unit J367
  11
• 1.8 Adapting battery monitor control unit J367
  11
• 2 Alternator
  12
• 2.1 Assembly overview - alternator
  12
• 2.2 Removing and installing alternator
  13
• 2.3 Checking alternator
  16
• 2.4 Removing and installing poly V-belt pulley
  16
• 2.5 Removing and installing voltage regulator
  24
• 3 Starter motor
  29
• 3.1 Assembly overview – starter
  29
• 3.2 Removing and installing starter
  29
• 4 Cruise control system (CCS)
  32
• 5 Start/stop system
  33
• 5.1 General description - start/stop system
  33
• 5.2 Removing and installing voltage stabiliser
  34
• Gauges, instruments
  35
• 1 Dash panel insert
  35
• 1.1 Assembly overview - dash panel insert
  35
• 1.2 Removing and installing dash panel insert KX2
  39
• 2 Horn
  42
• 2.1 Assembly overview - horn
  42
• 2.2 Removing and installing treble horn H2 and bass horn H7
  43
• Windscreen wash/wipe system
  44
• 1 Windscreen wiper system
  44
• 1.1 Assembly overview - windscreen wiper system
  44
• 1.2 Moving wipers to service position
  45
• 1.3 Removing and installing wiper blade
  45
• 1.4 Removing and installing wiper arms
  46
• 1.5 Adjusting wiper arms
  48
• 1.6 Removing and installing wiper motor V
  49
• 1.7 Renewing wiper motor
  50
• 1.8 Deactivating APP function of wiper motor
  53
• 1.9 Removing and installing rain and light sensor
  53
• 2 Windscreen washer system
  57
• 2.1 Assembly overview - windscreen washer system
  57
• 2.2 Removing and installing washer fluid reservoir
  58
• 2.3 Removing and installing windscreen washer pump
  59
• 2.4 Removing and installing washer jets
  60
• 2.5 Adjusting spray jets
  61
• 3 Rear window wiper system
  62
• 3.1 Assembly overview - rear window wiper system
  62
• 3.2 Removing and installing wiper blade
  63
• 3.3 Removing and installing wiper arm
  63
• 3.4 Adjusting wiper arm
  64
• 3.5 Removing and installing rear window wiper motor V12
  65
• 4 Rear window washer system
  67
• 4.1 Assembly overview - rear window washer system
  67
• 4.2 Removing and installing spray jet
  67
• 4.3 Adjusting spray jet
  68
• 5 Washer fluid lines
  69
• 5.1 Repairing washer fluid lines
  69
• Lights, bulbs, switches - exterior
  70
• 1 Headlights
  70
• 1.1 Assembly overview - headlight
  70
• 1.2 Removing and installing headlight
  71
• 1.3 Adjusting headlights
  73
• 1.4 Adjusting headlight installation position
  73
• 1.5 Removing and installing front turn signal bulb M5 / M7
  74
• 1.6 Installing repair kit for headlight housing
  76
• 1.7 Converting headlights from driving on right to driving on left
  79
• 1.8 Converting headlights from driving on left to driving on right
  79
• 1.9 Removing and installing headlight range control motor V48 / V49
  79
• 1.10 Removing and installing dipped beam bulb
  80
• 1.11 Removing and installing LED modules for daytime running light and side light L176 / L177
  82
• 1.12 Removing and installing control unit for daytime running light and side light J860 / J861
  82
• 2 Fog lights
  84
• 2.1 Assembly overview - fog lights
  84
• 2.2 Removing and installing fog light
  84
• 2.3 Removing and installing fog light bulb L22 / L23
  85
• 2.4 Adjusting fog lights
  86
• 3 Lights in exterior mirror
  87
• 3.1 Removing and installing turn signal
  87
• 3.2 Removing and installing turn signal repeater bulb L131 / L132
  87
• 4 Tail lights
  88
• 4.1 Assembly overview - tail lights in body
  88
• 4.2 Removing and installing bulb carrier
  89
• 4.3 Removing and installing tail light cluster
  89
• 4.4 Removing and installing tail light bulb M2 / M4
  90
• 4.5 Removing and installing rear fog light
  91
• 4.6 Removing and installing rear fog light bulb L46 / L47
  91
• 4.7 Removing and installing brake and tail light bulb M21 / M22
  92
• 4.8 Removing and installing reversing light bulb
  92
• 4.9 Removing and installing turn signal bulb
  93
• 5 High-level brake light
  94
• 5.1 Assembly overview - high-level brake light
  94
• 5.2 Removing and installing high-level brake light
  94
• 6 Number plate light
  97
• 6.1 Removing and installing number plate light X4 / X5
  97
• 6.2 Removing and installing bulb for number plate light X4 / X5
  97
• 7 Steering column switch module
  98
• 7.1 Assembly overview - steering column switch module
  98
• 7.2 Removing and installing steering column switch module
  99
• 7.3 Removing and installing steering column electronics control unit J527
  101
• 7.4 Removing and installing base for steering column combination switch
  103
• 7.5 Removing and installing turn signal switch E2
  103
• 7.6 Removing and installing cruise control system switch E45
  103
• 7.7 Removing and installing intermittent wiper switch E22
  103
• 7.8 Removing and installing ignition/starter switch
  104
• 7.9 Removing and installing lock cylinder
  105
• 7.10 Removing and installing steering lock housing
  106
• 7.11 Removing and installing ignition key withdrawal lock solenoid N376
  108
• 8 Parking aid
  109
• 8.1 Assembly overview – parking aid
  109
• 8.2 Removing and installing parking aid control unit J446
  109
• 8.3 Removing and installing rear parking aid warning buzzer H15
  110
• 8.4 Removing and installing rear parking aid senders
  111
• 9 Emergency braking function
  113
• 9.1 Removing and installing City Emergency Braking System
  113
• Lights, bulbs, switches - interior
  115
• 1 Lights
  115
• 1.1 Removing and installing Central locking SAFELOCK function warning lamp K133
  115
• 1.2 Renewing front interior light bulb W1
  115
• 1.3 Removing and installing bulb for front reading light W13 / W19
  117
• 2 Controls
  119
• 2.1 Removing and installing rotary light switch EX1
  119
• 2.2 Removing and installing headlight range control regulator E102
  120
• 2.3 Removing and installing switch module in middle of dash panel
  120
• 2.4 Removing and installing Start/Stop operation button E693
  122
• 2.5 Removing and installing hazard warning light button E229
  122
• 2.6 Removing and installing heated rear window button
  122
• 2.7 Removing and installing button for driver assist systems E617
  122
• 2.8 Removing and installing buttons for seat heating E653 / E654
  123
• 2.9 Removing and installing mirror adjustment switch E43 / E168
  123
• 2.10 Removing and installing operating unit for window regulator in driver door E512
  123
• 2.11 Removing and installing front window regulator switch
  125
• 2.12 Removing and installing driver side interior locking button for central locking system E308
  126
• 2.13 Removing and installing centre console switch module
  126
• 2.14 Removing and installing button for emergency braking function
  127
• 2.15 Removing and installing sliding sunroof adjustment regulator
  128
• 2.16 Removing and installing front interior light/reading light
  128
• 3 Immobiliser
  133
• 3.1 Removing and installing immobiliser control unit
  133
• 3.2 Removing and installing immobiliser reader coil
  133
• 4 Front camera for assist systems
  134
• 4.1 Assembly overview - front camera for assist systems
  134
• 4.2 Removing and installing front camera for driver assist systems R242
  134
• 4.3 Calibrating front camera for driver assist systems R242
  136
• 5 Cigarette lighter, socket
  143
• 5.1 Removing and installing cigarette lighter U1
  143
• 5.2 Removing and installing electric socket U
  143
• 5.3 Removing and installing bulb for illuminating cigarette lighter
  143
• Wiring
  144
• 1 Relay carriers, fuse holders, electronics boxes
  144
• 1.1 Removing and installing electronics box (E-box)
  144
• 1.2 Removing and installing relay and fuse holder in electronics box
  146
• 1.3 Removing and installing relay and fuse holder behind dash panel on driver side
  148
• 2 Control units
  154
• 2.1 Removing and installing onboard supply control unit J519
  154
• 2.2 Removing and installing data bus diagnostic interface J533
  155
• 3 Connectors
  156
• 3.1 Repairing electrical wiring harnesses and plug-in connections
  156
• 4 Releasing and dismantling connector housings
  157
• 5 Repairing aerial wires
  158
• 6 Vehicle diagnosis, testing and information systems
  159