| SB1 | 5A | With start/stop system: Control unit in dash panel insert, ABS control unit, Mobile telephone operating electronics control unit |
| SB2 | 10A | Steering column combination switch Onboard supply control unit (T73b/61) – Rear window wiper motor up to May 2010: Windscreen and rear window washer pump |
| SB3 | 5A | Fuel pump relay Engine control unit up to Nov 2010: Current supply relay for Simos control unit Fuel pump control unit (depending on equipment) Control unit for structure-borne sound Gas mode control unit (depending on equipment) |
| SB4 | 2A (up to May 2011) | up to May 2011: Steering column combination switch |
| SB5 | 5A | ABS control unit (if battery in luggage compartment) |
| SB6 | 5A | Control unit in dash panel insert |
| SB7 | 5A | Headlight range control regulator Left and right number plate light Onboard supply control unit |
| SB8 | 10A (up to May 2010) | up to May 2010: Injector, cylinder 1 to 4 |
| 10A (from May 2010) | from May 2010: Lambda probe heater Lambda probe 1 heater after catalytic converter Activated charcoal filter solenoid valve 1 |
| SB9 | 5A 7.5A (depending on equipment) | TCS and ESP button Tyre Pressure Loss Indicator button Steering angle sender ABS control unit Start/Stop operation button (start/stop system) Data bus diagnostic interface (start/stop system) from Nov 2010: Voltage stabiliser 2 (with start/stop system) |
| SB10 | 5A (up to Nov 2009) | up to Nov 2009: Cruise control system switch Steering column combination switch Brake light switch Clutch pedal switch Onboard supply control unit |
| 2A (from May 2011) | from May 2011: Steering column combination switch |
| SB11 | 10A 5A (from May 2010) | Headlight range control regulator Left and right headlight range control motor Control unit for cornering light and headlight range control from Nov 2009: Cruise control system switch from Nov 2009: Onboard supply control unit (T73a/44) |
| SB12 | 5A | Mirror adjustment switch |
| SB13 | 5A | Mechatronic unit for dual clutch gearbox Selector lever |
| SB14 | 5A | Airbag control unit Front passenger airbag deactivated warning lamp |
| SB15 | 5A | Left and right washer jet heater element |
| SB16 | 5A | Parking aid control unit |
| SB17 | 10A | from May 2010: Windscreen and rear window washer pump |
| SB18 | 5A | Rear fog light cut-out contact switch Control unit in dash panel insert Rear left fog light bulb from Nov 2009: Onboard supply control unit (T73a/6) |
| SB19 | 5A | Onboard supply control unit (T73a/42) – Ignition/starter switch, S-contact |
| SB20 | 5A | Steering angle sender Control unit in dash panel insert from May 2010: Fuel supply relay (depending on equipment) from May 2010: Terminal 30 voltage supply relay (depending on equipment) from May 2010: Low and high heat output relay |
| SB21 | 10A | Onboard supply control unit (T73a/66) – Driver and front passenger reading light, Interior light with switch-off delay, Driver and front passenger illuminated vanity mirror, Left and right footwell light, Right luggage compartment light, Rear centre reading light |
| SB22 | 5A | Diagnostic connection Climatronic control unit Air conditioning system control unit Mobile telephone operating electronics control unit Ignition key withdrawal lock solenoid |
| SB23 | 5A | Selector lever Rain sensor Onboard supply control unit (T73b/39) Engine control unit Data bus diagnostic interface |
| SB24 | 5A 10A (from May 2011) | Onboard supply control unit (T73a/64) – Heated exterior mirror on driver and front passenger side |
| SB25 | 5A | High-pressure sender Heater control unit Radiator fan control unit Air conditioning system control unit Trailer detector control unit Diagnostic connection Humidity sender (start/stop system) Voltage stabiliser (start/stop system) up to Nov 2010: Voltage stabiliser 2 (start/stop system) |
| SB26 | 7.5A | Air mass meter Oil level and oil temperature sender Power steering control unit Heater element for crankcase breather Starter relay 1 and 2 |
| SB27 | 7.5A | Reversing light switch |
| SB28 | 10A | Lambda probe before and after catalytic converter Lambda probe heater before and after catalytic converter |
| SB29 | 10A | Fuel pressure regulating valve Fuel metering valve |
| SB30 | 10A | Charge pressure control solenoid valve Activated charcoal filter solenoid valve 1 Exhaust gas recirculation cooler changeover valve Coolant circulation pump 2 Heater element relay (depending on equipment) |
| SB31 | 5A (diesel) 10A (petrol) | Gas gauge sender Automatic glow period control unit Fuel supply relay Additional coolant pump relay (depending on equipment) Injector, cylinder 1 to 4 Air mass meter (depending on equipment) |
| SB32 | 10A 15A 20A 30A (depending on equipment) | Engine control unit Gas mode control unit (depending on equipment) up to May 2010: Fuel gauge sender up to May 2010: Fuel system pressurisation pump |
| SB33 | 5A | Clutch position sender Brake light switch |
| SB34 | 15A 7.5A (depending on equipment) | Control unit in dash panel insert Left and right headlight main beam bulb Left and right gas discharge bulb control unit (depending on equipment) from Nov 2009: Onboard supply control unit (T73a/62) |
| SB35 | 15A 20A (depending on equipment) | Engine control unit Fuel supply relay |
| SB36 | 7.5A | Right headlight main beam bulb |
| SB37 | 25A | Heated driver and front passenger seat regulator Heated front seats control unit |
| SB38 | 30A | Mechatronic unit for dual clutch gearbox |
| SB39 | 10A 15A (depending on equipment) | Right headlight dipped beam bulb |
| SB40 | 30A | Fresh air blower switch Fresh air blower control unit |
| SB41 | 10A | Rear window wiper motor |
| SB42 | 15A | Cigarette lighter up to May 2010: 12 V socket |
| SB43 | 15A 20A (from May 2011) | Onboard supply control unit (T73b/13) – Front, rear, and side turn signal bulbs/repeaters; left, right, and high-level brake light bulbs |
| SB44 | 5A | Anti-theft alarm ultrasonic sensor Alarm horn |
| SB45 | 15A 20A (depending on equipment) | Control unit with display for radio and navigation Multimedia system control unit Radio Voltage stabiliser (start/stop system) |
| SB46 | 20A | Headlight washer system relay Onboard supply control unit (T73a/73) – Treble and bass horn |
| SB47 | 20A | Onboard supply control unit (T73a/68) – Windscreen wiper motor |
| SB48 | 25A | Onboard supply control unit (T73a/16) – Central locking lock units (doors and rear lid), Tank filler flap locking motor |
| SB49 | 30A (up to May 2010) | up to May 2010: Sliding sunroof adjustment control unit |
| 15A (from May 2010) | from May 2010: Fuel pump relay and Fuel supply relay (depending on equipment) |
| SB50 | 25A | Driver door control unit |
| SB51 | 25A | Front passenger door control unit |
| SB52 | 30A | Rear left and right door control unit |
| SB53 | 30A | Onboard supply control unit (T73b/67) – Heated rear window |
| SB54 | 15A | Left and right fog light bulb |
| SB55 | 15A 20A (depending on equipment) | Ignition coil 1 to 4 with output stage |
| SB56 | 15A | Left and right daytime running light bulb |
| SB57 | 15A | Onboard supply control unit (T73b/11) |
| SB58 | 20A | Brake servo vacuum pump |
| SB59 | 10A 15A (depending on equipment) | Left headlight dipped beam bulb |
| SB60 | 15A 20A (depending on equipment) | Control unit with display for radio and navigation (start/stop system) |