Table of Contents
The Mercedes-Benz CLS-Class debuted at the 2004 New York International Auto Show. Positioned as a four-door coupé, it is structurally a rear-wheel-drive fastback sedan designed by American designer Michael Fink. In this article, we take a detailed look at the fuse box diagrams and relay assignments for the first-generation Mercedes-Benz CLS-Class (C219 chassis; models: CLS 280, CLS 300, CLS 320, CLS 350, CLS 500, and CLS 55 AMG) manufactured from model years 2004 through 2010.
Below are the locations and photographs of the power distribution boxes. The fuses responsible for the “Cigarette Lighter” and “Fuel Pump” are highlighted in bold.
In the Trunk
Located on the left side behind the interior trim panel.
Representative photo overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Relay Assignment | |
| A | Gasoline fuel pump relay (except engines 113.990 [CLS 55 AMG], 156.983 [CLS 63 AMG], and 272.985) | |
| Charge air cooler circulation pump (engine 113.990 [CLS 55 AMG]) | ||
| B | Terminal 15R relay 2 | |
| C | Reserve | |
| D | Reserve | |
| E | Heated rear window relay | |
| F | Terminal 15R relay 1 | |
| G | Fuel filler flap central locking polarity reversing relay 1 | |
| I | Fuel filler flap central locking polarity reversing relay 2 | |
| No. | A | Circuit Protected |
| 1 | 30 | Front passenger seat partial adjustment switch |
| Driver seat partial adjustment switch (from 2007) | ||
| Driver seat power adjustment control unit with memory | ||
| 2 | 30 | Driver seat partial adjustment switch |
| Front passenger seat power adjustment control unit | ||
| 3 | 7.5 | Tire Pressure Monitor (TPM/RDK) control unit |
| PARKTRONIC system (PTS) control unit | ||
| Navigation system processor | ||
| Combination TV tuner (analog/digital) | ||
| 4 | 20 | Except engines 156.983 (CLS 63 AMG) and 272.985: Gasoline fuel pump (via fuel pump relay) |
| 4 | 7.5 | Engine 113.990 (CLS 55 AMG): Charge air cooler circulation pump |
| 5 | - | Spare relay socket 2 |
| 6 | 40 | Audio Gateway (AGW) control unit |
| 7 | 15 | Rear window wiper relay |
| 8 | 7.5 | Left antenna amplifier module |
| Signal horn | ||
| Alarm siren with auxiliary battery | ||
| Anti-theft alarm (ATA/EDW) tilt sensor | ||
| 9 | 25 | Overhead control panel (OCP) control unit |
| 10 | 40 | Heated rear window |
| 11 | 20 | - |
| 12 | 15 | USA models: Luggage compartment auxiliary 12V socket |
| 13 | 15 | Interior auxiliary 12V socket |
| 14 | 5 | - |
| 15 | 10 | Fuel filler flap central locking (CL/ZV) |
| 16 | 20 | Seat heating (SIH) and seat ventilation control unit |
| 17 | 20 | - |
| 18 | 20 | - |
| 19 | 20 | Multicontour seat pneumatic pump |
| 20 | 7.5 | Rear window roller blind relay |
In the Passenger Compartment
The fuse box is located on the driver's side of the instrument panel, behind the side end-cover.
Removing the side end-cover.
| Diagram | ||
|---|---|---|
|
||
| No. | A | Circuit Protected |
| 21 | 30 | Rear right door control unit |
| 22 | 30 | Front right door control unit |
| 23 | 30 | Front passenger seat adjustment control unit with memory |
| 24 | 25 | Rear control module / Keyless-Go |
| Rear left door / Keyless-Go | ||
| Rear right door / Keyless-Go | ||
| 25 | 20 | Auxiliary heater (STH) |
| 25 | 5 | Auxiliary heater (STH) radio remote control receiver |
| 26 | 7.5 | CD changer |
| 27 | - | Reserve |
| 28 | 15 | Radio |
| 28 | 5 | Radio remote control and navigation module |
| COMAND display and operating unit | ||
| 29 | 7.5 | Steering column module (SCM/MRM) |
| Exterior lamp switch | ||
| Electronic Ignition Switch (EIS/EZS) | ||
| 30 | 7.5 | Data Link Connector (OBD-II DLC) |
| 31 | 5 | Overhead control panel (OCP) control unit |
| Consumer cutoff relay (up to 2007) | ||
| 32 | 30 | Rear left door control unit |
| 33 | 30 | Front left door control unit |
| 34 | 30 | Driver seat adjustment control unit with memory |
| 35 | 5 | Weight Sensing System (WSS) control unit |
| 36 | 25 | Seat heating (SIH) and seat ventilation control unit |
| Right Signal Acquisition and Actuation Module (SAM) | ||
| 37 | 15 | AIRmatic with Adaptive Damping System (ADS) control unit |
| 38 | 7.5 | NECK-PRO head restraint relay |
| 39 | 5 | Lower control panel (LCP) control unit |
| 40 | 10 | Seat heating (SIH) and seat ventilation control unit |
| 41 | 5 | Central Gateway (CGW/ZGW) control unit |
| 42 | 7.5 | Motor Electronics (ME-SFI/ME) control unit |
| Driver-side SAM with fuse and relay module | ||
In the Engine Compartment
Located on the left (driver) side of the engine compartment, behind the protective cover.
Access to the engine compartment fuse box.
General view of the fuse and relay module.
| Diagram | ||
|---|---|---|
|
||
| No. | A | Circuit Protected |
| I | - | Terminal 87 engine relay |
| K | - | Terminal 87 chassis relay |
| L | - | Starter relay |
| M | - | Reserve |
| N | - | Terminal 15 relay |
| O | - | Fanfare horn relay |
| P | - | Terminal 15R relay |
| R | - | Secondary air injection pump relay (except engines 113.990 [CLS 55 AMG] and 156.983 [CLS 63 AMG]) |
| - | Engine oil cooler fan relay (engines 113.990 [CLS 55 AMG] and 156.983 [CLS 63 AMG] only) | |
| S | - | AIRmatic (semi-active air suspension) compressor relay |
| 43 | 15 | Engines M156, M272, M273: ME-SFI control unit / Rear SAM control unit |
| Engine M642: CDI control unit / Rear SAM control unit | ||
| Engine M113: ME-SFI control unit / Rear SAM control unit / Fuel pump and secondary air injection relays | ||
| 44 | 15 | Engine M642: CDI control unit |
| 45 | 7.5 | AIRmatic with Adaptive Damping System (ADS) control unit |
| 46 | 7.5 | 5-speed automatic transmission (NAG1): Electronic Transmission Control (ETC/EGS) |
| 7-speed automatic transmission (7G-Tronic): Fully integrated transmission control unit (VGS) | ||
| 47 | 5 | Electronic Stability Program (ESP) control unit |
| 48 | 7.5 | Supplemental Restraint System (SRS) control unit |
| 49 | 7.5 | Front left emergency tensioning retractor (from 2007) |
| Front right emergency tensioning retractor (from 2007) | ||
| Supplemental Restraint System (SRS) control unit (up to 2007) | ||
| Front passenger seat occupancy and automatic child seat recognition sensor (up to 2007); NECK-PRO head restraint relay (2006) | ||
| 50 | 5 | VICS power supply disconnect connector |
| 51 | 5 | - |
| 52 | 7.5 | Glove compartment light with switch |
| Instrument cluster | ||
| Exterior lamp switch | ||
| Bi-Xenon headlights: Headlamp range adjustment control unit | ||
| 53a | 15 | Signal horn relay |
| 53b | 15 | |
| 54a | 15 | Cigarette lighter fuse (Mercedes-Benz CLS C219) |
| 54b | 15 | |
| 55 | 5 | VICS power supply disconnect connector |
| 56 | 40 | Windshield wiper motor |
| 57 | 25 | Engines M156, M272, M273: ME-SFI control unit / Rear SAM control unit |
| Engine M642: CDI control unit / Rear SAM control unit | ||
| 58 | 15 | Purge control valve (up to 2007) |
| Engine M272: Automatic Air Conditioning (AAC) with integrated electric fan control (up to 2007) | ||
| USA models: Evaporative emission (EVAP) canister shut-off valve (up to 2007) | ||
| Engine M642: CDI control unit (2006) | ||
| Engines M113, M156, M272, M273: Ignition coils | ||
| Engine M113: Left and right downstream oxygen (O2) sensors (post-TWC) | ||
| 59 | 15 | Starter relay |
| 60 | 10 | Engines 113.990 (CLS 55 AMG) & 156.983 (CLS 63 AMG): Engine oil cooler fan |
| 61 | 40 | Secondary air injection pump |
| 62 | 30 | Terminal 15R backup relay |
| 63 | 15 | - |
| 64 | 7.5 | Exterior lamp switch |
| Automatic Air Conditioning (AAC) control module | ||
| Instrument cluster (up to 2007) | ||
| Automatic Air Conditioning (KLA/AAC) operating unit (up to 2007) | ||
| 65 | 20 | Electronic Ignition Switch (EIS/EZS) control unit |
| Electric steering lock (ESL/ELV) | ||
| 66 | 7.5 | Left-hand drive (LHD): Front right headlamp |
| Right-hand drive (RHD): Front left headlamp | ||
| Bi-Xenon headlights: Headlamp range adjustment (HRA) power supply | ||
| 67 | 10 | Brake light switch |
