
| No. | A | Description |
|---|---|---|
| 1 | 30 | Front passenger partially-electric seat adjustment switch Driver-side front seat adjustment control unit, with memory |
| 2 | 30 | Driver partially-electric seat adjustment switch Passenger-side front seat adjustment control unit with memory |
| 3 | 7.5 | Tire pressure monitor control unit PARKTRONIC control unit TV combination tuner (analog/digital) Navigation processor |
| 4 | 15 | Except M113.990, M156.983: Fuel pump |
| 20 | Except M113.990, M156.983 (2007→): Fuel pump | |
| 15 | M113.990: Charge air cooler circulation pump | |
| 5 | - | - |
| 6 | 40 | Audio gateway control unit |
| 7 | 15 | Rear-end door control unit |
| 8 | 7.5 | Left antenna amplifier module ATA [EDW] inclination sensor Alarm horn |
| 9 | 25 | Overhead control panel control unit |
| 10 | 40 | Heated rear window |
| 11 | 20 | Rear-end door control unit |
| 12 | 15 | Cargo area connector box |
| 13 | 15 | Interior socket |
| 14 | - | - |
| 15 | 10 | Fuel filler flap CL [ZV] motor |
| 16 | 20 | Seat heating and seat ventilation control unit |
| 17 | 20 | Trailer connection unit control unit |
| 18 | 20 | Trailer connection unit control unit |
| 19 | 20 | Multicontour seat pneumatic pump |
| 20 | 7.5 | Rear window roller blind relay |
| Relay | ||
| A | except M113.990, M156.983: Fuel pump | |
| M113.990: Charge air cooler circulation pump | ||
| B | Relay 2, terminal 15R | |
| C | Spare | |
| D | Rear wiper | |
| E | Heated rear window | |
| F | Relay 1, terminal 15R | |
| G | Fuel filler cap polarity reverser 1 | |
| H | Fuel filler cap polarity reverser 2 | |
Gasoline:
Diesel:


| No. | A | Description |
|---|---|---|
| 150 | Feed-in:Rear prefuse box | |
| 21 | 25 | →2007: Right rear door control unit |
| 30 | 2007→: Right rear door control unit | |
| 22 | 25 | →2007: Right front door control unit |
| 30 | 2007→: Right front door control unit | |
| 23 | 30 | Front passenger front seat adjustment control unit with memory |
| 24 | 25 | Circuit 30 connector sleeve, Keyless Go |
| 25 | 25 | Stationary heater unit |
| 5 | In addition fused via polyswitch fuse for stationary heater: Stationary heater radio remote control receiver | |
| 26 | 7.5 | CD changer |
| 27 | 5 | 2007→: Terminal 15 relay |
| 28 | 5 | Radio COMAND operating, display and control unit |
| 15 | Radio control panel and navigation unit COMAND operating, display and control unit | |
| 29 | 7.5 | Steering column module EIS [EZS] control unit |
| 15 | →2006: DC/DC converter control unit | |
| 30 | 7.5 | Data link connector |
| 31 | 5 | Upper control panel control unit Cutoff relay for interruptible loads (2006-2007) |
| 7.5 | →2006: Driver-side SAM control unit with fuse and relay module | |
| 32 | 30 | Left rear door control unit |
| 33 | 30 | Left front door control unit |
| 34 | 30 | Driver-side front seat adjustment control unit, with memory |
| 35 | 5 | WSS (Weight Sensing System) control unit (2007→; USA) |
| 36 | 25 | Heated seats and seat ventilation control unit |
| 37 | 15 | AIRmatic with ADS control unit |
| 38 | 7.5 | NECK-PRO head restraints relay |
| 39 | 5 | Lower control panel control unit |
| 40 | 10 | Heated seats and seat ventilation control unit |
| 5 | →2006: Upper control panel control unit | |
| 41 | 5 | Central gateway control unit |
| 42 | 7.5 | Cutoff relay for interruptible loads (→2006) ME-SFI [ME] control unit OM629, OM642, OM646 EVO:Terminal 87 relay, engine Driver-side SAM control unit with fuse and relay module (engine M271, M272, OM628, OM629, OM642, OM646, OM647, OM648) CNG control unit (M271) |

| No. | A | Description |
|---|---|---|
| 43 | 15 | M112, M113, M156, M271, M272, M273: ME-SFI [ME] control unit M271, M272, M273: ME control unit OM628, OM629, OM642, OM646, OM647, OM648: CDI control unit Driver-side SAM control unit with fuse and relay module Rear SAM control unit with fuse and relay module OM629, OM642, OM646, OM647, OM648: CDI control unit Rear SAM control unit with fuse and relay module |
| 44 | 15 | OM646, OM647, OM648: CDI control unit M271, M272, M273: ME-SFI [ME] control unit M271 (Bivalent natural gas drive): Cyl. 1 gas injection valve Cyl. 2 gas injection valve Cyl. 3 gas injection valve Cyl. 4 gas injection valve |
| 45 | 7.5 | AIRmatic with ADS control unit Electronic selector lever module control unit (automatic five-speed transmission (NAG)) Rear axle level control system control unit Gear recognition switch (Sequentronic automated manual transmission (SEQ)) |
| 46 | 7.5 | ETC [EGS] control unit (automatic 5-speed transmission (NAG)) VGS electric control unit (automatic 7-speed transmission) Automated manual transmission control unit (sequentronic automated manual transmission (SEQ)) |
| 47 | 5 | ESP, SPS [PML] and BAS control unit |
| 48 | 7.5 | Restraint systems control unit Left front reversible emergency tensioning retractor (2007→) Right front reversible emergency tensioning retractor (2007→) |
| 49 | 7.5 | Restraint systems control unit Front passenger seat occupied and child seat recognition sensor NECK-PRO head restraints relay |
| 50 | 5 | Portable CTEL separation point VICS power supply separation point Emergency call system control unit |
| 51 | 5 | Spare |
| 52 | 7.5 | Exterior lamp switch Instrument cluster Glove compartment illumination with switch AAC with integrated control additional fan motor (2007→) Bi-xenon headlamp unit: Headlamp range adjustment control unit |
| 53a | 15 | Spare |
| 53b | 15 | Fanfare horn relay |
| 54a | 15 | Illuminated cigar lighter |
| 54b | 15 | Illuminated cigar lighter |
| 55 | 7.5 | Telephone handset (→2007) Bluetooth module connector (→2007) Portable CTEL separation point Emergency call system control unit (2007→) |
| 56 | 40 | Wiper motor |
| 57 | 25 | OM628, OM646, OM647, OM648: CDI control unit M271, M272, M273: ME-SFI [ME] control unit Purge control valve PremAir Sensor USA: Activated charcoal canister shut-off valve |
| 58 | 15 | M112, M113, M156: Cylinder 1 ignition coil Cylinder 2 ignition coil Cylinder 3 ignition coil Cylinder 4 ignition coil Cylinder 5 ignition coil Cylinder 6 ignition coil Cylinder 7 ignition coil Cylinder 8 ignition coil |
| 59 | 15 | →2007: Starter relay |
| 20 | 2007→: Starter relay | |
| 60 | 10 | M113, M156: Oil cooler fan |
| 61 | 40 | Electric air pump |
| 62 | 30 | SEQ pump control relay (Sequentronic automated manual transmission (SEQ)) |
| 63 | 15 | Automated manual transmission control unit (Sequentronic automated manual transmission (SEQ)) M112, M113: Circuit 87 relay, engine ME-SFI [ME] control unit |
| 64 | 7.5 | Exterior lamp switch Instrument cluster AAC [KLA] control and operating unit Comfort AAC [KLA] control and operating unit Steering column module (→2007) |
| 65 | 20 | IS [EZS] control unit Electric steering lock control unit |
| 66 | 7.5 | Right front lamp unit Left front lamp unit HRA [LWR] selector wheel (2007→) Bi-xenon headlamp unit: HRA power module |
| 67 | 5 | Stop light switch |
| Relay | ||
| I | Terminal 87 (engine) | |
| K | Terminal 87 (chassis) | |
| L | Starter | |
| M | SEQ pump control | |
| N | Terminal 15 | |
| O | Fanfare horn | |
| P | Terminal 15R | |
| R | except 113.990, 156.983: Air pump | |
| 113.990, 156.983: Oil cooler fan | ||
| S | Airmatic | |


| No. | A | Description |
|---|---|---|
| Feed-in: Battery (G1) | ||
| 68 | 200 | OM629, OM642, OM646, OM647, OM648: Heater booster |
| 69 | 150 | Valid for engine OM629, OM642, OM646 EVO: Glow time output stage |
| 70 | - | External start terminal point |
| 71 | 150 | M112, M113, M156, M271, M272, M273, OM629, OM642, OM646, OM647, OM648: AAC with integrated control additional fan motor |
| 100 | OM629, OM642, OM646 EVO: Engine and AC electric suction fan with integrated control | |
| 72 | 50 | Traction system hydraulic unit |
| 73 | 40 | Traction system hydraulic unit 2007→: ESP control unit |
| 74 | 40 | AIRmatic relay |
| 75 | 40 | Right SAM control unit |
| 76 | 40 | Right front reversible emergency tensioning retractor M113.990: Air injection relay |
| 77 | 40 | Blower motor Heating systems recirculation unit Solar generator control unit |


| No. | A | Description |
|---|---|---|
| Feed-in: Battery | ||
| 78 | 200 | Driver-side SAM control unit with fuse and relay module |
| 79 | 200 | Rear SAM control unit with fuse and relay module |
| 80 | 150 | Driver-side SAM control unit with fuse and relay module |
| 81 | 150 | Interior fuse box |
| 82 | 150 | M113.990, M156.983: Fused via terminal 30 connector sleeve: Fuse F82A and F82B |
| F82A | 40 | M156.983: Fuse for left fuel pump control unit Fuse for right fuel pump control unit |
| 30 | M113.990, M156.983: Fuel pump relay | |
| F82B | 40 | Air injection relay fuse |
| 83 | 30 | Taxi: Special vehicle multifunction control unit (SVMCU [MSS]) |
| 84 | 5 | Battery sensor |
| 85 | 5 | Telephone interface Universal Portable CTEL Interface (UPCI [UHI]) control unit Hands-free system control unit Voice control system control unit |
| 86 | 5 | →2003: Interior socket |
| 30 | 2004-2006: Interior socket | |
| 5 | 2007→: Interior socket | |
| 5 | USA: SDAR control unit | |
| 30 | Government vehicles: Special vehicle multifunction control unit (SVMCU [MSS]) Taxi: Special vehicle multifunction control unit (SVMCU [MSS]) | |
| 87 | 30 | Pneumatic pump for dynamic seat control |
| 88 | 30 | TLC [HDS] control unit Rear-end door closing control unit |
| 89 | 40 | Loading floor control unit |
| 90 | 40 | Left front reversible emergency tensioning retractor Special vehicle multifunction control unit (SVMCU [MSS]) |
| 30 | M113.990 (→02.2003): Fuel pump relay | |
| 91 | 40 | Special vehicle multifunction control unit (SVMCU [MSS]) |