| fuse | - | Since 2009: Radio Antenna Noise Filter. Mic group control unit (Japan) |
| fuse | - | HBF control unit |
| fuse | - | PTS control unit (park assist). Receiving unit for radio remote control of the auxiliary heater STH |
| fuse | - | DVD player. Rear audio control unit. Electrical connector mobile phone circuits (Japan). GSM network compensator 1800. Bluetooth module. UHI control unit (universal mobile phone interface) |
| fuse | - | Front right recessive seat belt pretensioner |
| fuse | - | Control and display unit COMAND |
| fuse | - | Front right door control unit |
| fuse | - | Seat adjustment control unit with memory function, front passenger |
| fuse | - | Driver's seat adjustment control unit with memory |
| fuse | - | Front left recessive seat belt pretensioner |
| fuse | - | From 2009: Rear bench seat control unit. Engines 156: Left fuel pump control unit. Right fuel pump control unit. |
| fuse | - | Control unit for heating, seat ventilation and heated steering wheel |
| fuse | - | AIRMATIC control unit |
| fuse | - | Keyless-Go system control unit |
| fuse | - | Front left door control unit |
| fuse | - | Speaker Amplifier. Since 2009: Subwoofer amplifier |
| fuse | - | Emergency call system control unit |
| fuse | - | Reversing camera power supply module (Japan). Reversing camera control unit (Japan) |
| fuse | - | Combined TV tuner (analog/digital) (Japan) |
| fuse | - | RDK control unit (tire pressure monitoring system). From 2009: High-Definition Tuner Control Unit. Digital audio broadcasting control unit. Detachable connection of the outer part of the navigation system (South Korea) |
| fuse | - | From 2009: Tailgate close control unit |
| fuse | - | Ceiling Control Panel |
| fuse | - | Since 2009: Ceiling mounted control panel |
| fuse | - | Since 2009; engines 272, 273: Fuel pump control unit |
| fuse | - | From 2009: Interior socket front (USA). 115V socket |
| fuse | - | Socket in luggage compartment. From 2009: Power outlet 2nd row right |
| fuse | - | Cigarette lighter, front |
| fuse | - | Since 2009: Door lights |
| fuse | - | From 2009: Rear differential lock control unit. Engines 642.820: AdBlue supply relay. For 164.195, 164.1 with engine 272, and 164.8 with engine 642 or 273: Pyrotechnic disconnecting element |
| fuse | - | Heated rear window |
| fuse | - | Tailgate wiper motor |
| fuse | - | Carbon canister shut-off valve |
| fuse | - | Front left reversible seat belt pretensioner. Front right reversible seat belt pretensionen. Rear differential lock control unit |
| fuse | - | AIRMATIC control unit. Engines 156: Left fuel pump control unit. Right fuel pump control unit. Engines 272, 273: Fuel pump control unit. From 2009: Transfer case control unit |
| fuse | - | Headlight range control unit. SAM control unit, front |
| fuse | - | Instrument cluster. Rotary switch outdoor lighting |
| fuse | - | Engines 642.820: AdBlue control unit |
| fuse | - | Fuel pump (except 156 engine) |
| fuse | - | Diagnostic socket. Central interface control unit |
| fuse | - | From 2009: NECK-PRO headrest solenoid coil on the back of the driver's seat. NECK-PRO headrest solenoid coil on right front seat back |
| fuse | - | Glove box lighting with micro switch. Fuse and relay box in the engine compartment. Rear SAM control unit. Electrical connector mobile phone chain. Detachable connection VICS+ETC power supply (Japan). Air pump for multicontour seat (since 2009). Detachable connection of the outer part of the navigation system (South Korea). Blind spot monitoring electrical plug interior/rear bumper (as of 1.8.10). Emergency call system control unit (USA) |
| fuse | - | Since 2009: Passive safety system control unit. Seat contact strip, front right |
| fuse | - | Passenger seat adjustment switch |
| fuse | - | Driver's lumbar adjustment control unit. Front passenger's lumbar support adjuster control unit. Driver seat adjustment switch |
| fuse | - | |
| fuse | - | |
| fuse | - | From 2009: Air pump for multicontour seat |
| fuse | - | Rear air conditioning fan motor |
| fuse | - | From 2009: Control unit for heating, seat ventilation and heated steering wheel |
| fuse | - | From 2009: Rear differential lock control unit |
| fuse | - | AHV drawbar connector, 13-pin (up to 2008) |
| fuse | - | AHV drawbar connector, 13-pin (since 2009). AHV drawbar connector, 7-pin |
| fuse | - | Plug connection Elektric-Brake-Control |
| fuse | - | AHV drawbar connector, 13-pin |
| battery-terminal | - | |
| connector | - | |
| connector | - | |
| relay | - | Terminal 15R seat adjustment. From 2009: Socket terminal 15R circuit relay (off-delay) (F4kK) (electrical seat adjustment power supply) |
| relay | - | Relay terminal 30X |
| relay | - | Heated rear window relay |
| relay | - | Relay el. terminal 15 circuits |
| relay | - | Fuel pump relay |
| relay | - | Rear Wiper Relay |
| relay | - | Relay terminal 15R |
| relay | - | Reserve 1 (changeover relay) (front socket power supply) |
| relay | - | Terminal 30 socket 2nd seat row and luggage compartment. From 2009: Reserve 2 (NC relay) (power supply for outlets in center and rear) |
| relay | - | Relay el. terminal 30 circuits (trailer) |
| relay | - | Reserve relay 2 |