MB Medic Mercedes-Benz Repair Guides, Service, How To DIY
This guide covers fuse box locations and common fuse assignments for 2008 to 2014 Mercedes-Benz C-Class W204 models, including the C180, C200, C250, C300, C350, and C63 AMG.
If you replace any fuses, replace them with the same color fuse. If there is an underlying problem, you could overload the wires or even cause more severe problems to that circuit if you use a higher-ampere fuse. Ensure the new fuse you are installing has the same color and ampere rating as the old one. If you install a new fuse and it blows again shortly afterward, stop and diagnose the affected circuit, and you need to get it diagnosed. When you replace fuses, make sure your ignition is off.
You can get a lot of fuses for cheap on Amazon, like these here. Make sure to replace the fuses with the correct color and amperage rating. If the fuse tests good and the problem persists, the fault is in the circuit or the module itself. The next step is to read fault codes with one of the best OBD II scanners for Mercedes-Benz.
Common fuse assignments by system
If you need to know the ampere rating or the location of the fuse box, check out the images below.
| A/C system and heater | 12 |
| ABS/ASR/BAS/ESP | 1,6,13,14,16,20,21 |
| Rear compartment A/C | 119 |
| Adaptive Damping System | 12,17 |
| Airbag Systems | 8,15,37,77 |
| Ambient Lighting | 2,3,39,41 |
| Antenna Module | 46 |
| Anti-theft alarm | 46 |
| Auto-dimming rearview mirror | 17 |
| Automatic Transmission | 16,33 |
| Brake Lights | 21 |
| CD Changer | 43 |
| Ceiling Lamps | 17 |
| Central Display | 11 |
| Central Locking | 2,3 |
| Cigar Lighter | 71 |
| COMAND | 26 |
| Height adjustment control unit | 69 |
| Courtesy lights and warning lamps | 2,3,39,41 |
| Diagnostic Socket | 16 |
| Engine Electronics | 6,19,22,23,24,25,27,32,75 |
| Exterior Lamp Switch | 18 |
| Exterior Mirror Function | 2,3 |
| Fanfare Horn | 13,31a,31b |
| Fuel Pump | 4,6,19,23,27,42 |
| Garage Door Opener | 17 |
| Glove Compartment Light | 21 |
| Hazard Warning Flasher | 18 |
| Headlamp Flasher | 13 |
| Headlamp range adjustment | 29,30 |
| Heated rear window | 49 |
| Ignition lock | 19,27 |
| Instrument cluster | 5,28 |
| Interior motion sensor | 46 |
| KEYLESS-GO | 74 |
| Makeup mirror lamp | 17 |
| Mobile phone | 21 |
| Multicontour seats | 60 |
| Multifunction steering wheel | 13 |
| NECK-PRO | 37 |
| Panoramic glass roof | 17 |
| PARKTRONIK system | 12,59 |
| Power window, front | 2,3 |
| Power window, rear | 39,41 |
| PRE-SAFE system | 50,51 |
| Radio systems | 26,84 |
| Rain sensor | 17 |
| Reading lamps | 17 |
| Rear compartment | 86 |
| Rear window sunshade | 12 |
| Rear window washer system | 38 |
| Remote tailgate closing | 61 |
| Satellite Radio | 26,84 |
| Seat adjustment, front | 2,3,44,45,116,126 |
| Seat heating, driver | 12 |
| Seat heating, front passenger | 12 |
| Front power outlet | 9,71,78 |
| Cargo compartment power outlet | 72 |
| Rear power outlet | 76 |
| Sound system | 67 |
| Starter | 6,7,19,27 |
| Steering lock | 19,27 |
| Steering wheel adjustment | 2,116 |
| Switch illumination | 2, 3, 12, 17, 39, 41 |
| TELE AID | 83, 87 |
| Tilting/Sliding Sunroof | 17 |
| Tire pressure monitoring system | 70 |
| Tow-away protection | 46 |
| Trailer brake | 53 |
| Trailer hitch | 53, 54, 56, 57, 58 |
| Turn signal lamps | 13 |
| TV tuner | 85 |
| Windshield washer pump | 13 |
| Windshield wipers, rear | 13 |
| Windshield wipers, front | 10,13 |
FUSE COLOR = AMPERAGE RATING
| Fuse Color | Ampere |
| Black | 1 |
| Beige | 5 |
| Brown | 7.5 |
| Red | 10 |
| Blue | 15 |
| Yellow | 20 |
| White | 25 |
| Green | 30 |
| Amber | 40 |
| Red | 50 |
| Blue | 60 |
Where Are the Fuse Boxes in the W204 C-Class?
In the C Class, there are fuses in three locations:
Engine compartment fuse box
Driver side dashboard fuse box:Â
Right side of the trunk fuse box:Â
Applicable models:
2008 2009 2010 2011 2012 2013 2014
C350 C300 C250
What is the Best Scanner for Diagnosing Tripped Fuses and Broken Relays on a Mercedes-Benz?
If the fuse and power supply test good, scan the affected module before replacing parts. The YOUCANIC UCAN-II Pro reads Mercedes fault codes and live data and runs active tests where supported to help isolate wiring, relay, and control module faults. It includes full AI Diagnosis, TPMS sensor programming built into the tool, a rear VIN scanning camera, support for 140+ makes, 3,500+ active tests, and 1,000+ special functions. It has no subscription and does not require AutoAuth.
Overall, the YOUCANIC full system diagnostic scanner is invaluable for any Mercedes-Benz owner or technician looking to troubleshoot problems quickly and accurately. With its user-friendly interface and powerful diagnostic capabilities, you can save time, money, and frustration by diagnosing and resolving issues with your Mercedes-Benz quickly and efficiently.
