Fuses
Issues - Fuse and Relay Box
Quickly Identifying Fuse Consuming Units
It is a constant pain to have to visually search through the M-B supplied list of fuses in order to establish what consuming unit/s a particular number fuse protects.
Below are searchable indexes in both numerical and alphabetical format. Once the document is open on a computer, enter Control F to search or find a key word such as “f35” or “seat heating”.
The indexes are cross referenced with the Fuse Number, Fuse Rating, Fuse Colour, Fuse Location, Consuming Unit/s.
It is recommended that you keep a printed version of the two tables in a plastic sleeve with the spare fuses in the spare wheel well.
Searchable Alphabetical Index - Fuses
Fuses Indexed Alphabetically by Consuming Unit with Fuse Number, Rating, Colour and Location.
Searchable Numerical Index - Fuses
Fuses Indexed by Location and Number, with Rating, Colour and Consuming Unit/s.
Location - Battery Fuses
Location - Fuse and Relay Box
In Cabin; Dashboard Fuse Box
In Cabin; Dashboard Fuse Box (LHD on R or passenger side and RHD on L or passenger side)
Note: Images show fuse box location in left-hand drive vehicles.
In Cabin; Under Right Rear Seat
In Engine Compartment Fuse and Relay Boxes
There are fuse boxes located in the engine compartment on both the driver's and front passenger side in front of the firewall (dividing wall between engine compartment and passenger compartment).
Individual Location - Fuse and Relay Box
In Cabin; Dashboard Fuse Box - Fuses 78 to 86
Fuses 78 to 86 Dashboard
In Cabin; Under Right Rear Seat - Fuses 50 to 77 and Relays
Fuses 50 to 77 and Relay Box Under Right Rear Seat
Relays Q to U in Cabin, Under Right Rear Seat
In Engine Compartment Left - Fuses 1 to 27 and Relay Box
Fuses 1 to 27 and Relay Box in Engine Compartment Left
Relays A to J in Engine Compartment, Left
In Engine Compartment Right - Fuses 28 to 49 and Relay Box
Fuses 28 to 49 and Relay Box in Engine Compartment Right
Relays K to P in Engine Compartment, Right
In Engine Compartment Front, Right - Fuses 87 to 91 and Relay Box
Fuses 87 to 91 and Relays in Engine Compartment Front, Right, 12 Cylinder AMG Only
Relays V to X in Engine Compartment, Front, 12 Cylinder AMG Only
SAM (Signal Acquisition / Actuation Module)
Prefuses
There are two prefuse boxes in W220. X4/10 (underneath the passenger footwell carpets) and X4/22 (trunk right).