Mercedes Benz 2009 M-Class User Manual

The electrical fuses in your vehicle serve to 
switch off malfunctioning power circuits.

If a fuse is blown, the components and sys-
tems secured by that fuse will stop operat-
ing.

If a newly inserted fuse blows again, have 
the cause determined and rectified by an 
authorized Mercedes-Benz Light Truck 
Center.

The following aids are available to help you 
replace fuses. They are included with the 
vehicle tool kit (

컄

page 469):

앫

Fuse chart

The fuse chart explains the fuse alloca-
tion and fuse amperages.

앫

Spare fuses

앫

Fuse extractor

The electrical fuses are located in different 
fuse boxes:

앫

Fuse box in engine compartment 
(

컄

page 523)

앫

Fuse box in cargo compartment 
(

컄

page 523)

앫

Fuse box in passenger compartment 
(

컄

page 524)

Before replacing fuses:

왘

Apply parking brake (

컄

page 65).

왘

Make sure the automatic transmission 
is set to P (

컄

page 187).

The gear position indicator in the multi-
function display should be on 

P

.

왘

Turn off all electrical consumers.

왘

Turn off the engine (

컄

page 40).

왘

Remove the SmartKey from the starter 
switch.

Vehicles with KEYLESS-GO*:

왘

Open the driver’s door (this puts 
the starter switch in position 0, 
same as with the SmartKey re-
moved from the starter switch). The 
driver’s door then can be closed 
again.

G

Only use fuses approved by Mercedes-Benz 

with the specified amperage for the system 

in question and do not attempt to repair or 

bridge a blown fuse. Using other than ap-

proved fuses or using repaired or bridged 

fuses may cause an overload leading to a 

fire, and/or cause damage to electrical 

components and/or systems. Have the 

cause determined and remedied by an au-

thorized Mercedes-Benz Light Truck Center.

i