Opening and closing the fuse box in the engine compartment
Requirements:
Observe the notes on electrical fuses More.
Have the following tools readily available:
a dry cloth
a screwdriver with an appropriate head
Opening
Depending on the vehicle equipment, access to the fuse box may be limited. Mercedes-Benz recommends consulting a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
WARNING Risk of injury from using the windscreen wipers while the engine bonnet is open
When the engine bonnet is open, and the windscreen wipers are set in motion, you can be trapped by the wiper linkage.
Always switch off the windscreen wipers and ignition before opening the engine bonnet.
Release the rotary catches on cover 
and pull the cover up and out.
and pull the cover up and out. Remove any existing moisture from the fuse box using a dry cloth.
Depending on the vehicle equipment, there may be an electrical component 
on the fuse box lid. If present, unscrew screw 
and put the component to the side without disconnecting the electrical connection.
on the fuse box lid. If present, unscrew screw and put the component to the side without disconnecting the electrical connection. 
If present, release hoses 
from the retaining clips on the fuse box and vehicle body.
from the retaining clips on the fuse box and vehicle body. 
If present, release hoses 
from the retaining clips in the engine compartment and vehicle body.
from the retaining clips in the engine compartment and vehicle body. 
Unscrew screws 
and fold out bar 
.
and fold out bar . 
Unscrew screws 
and remove fuse box lid 
to the side.
and remove fuse box lid to the side. Closing
Check whether the seal is positioned correctly in lid .
. Place lid on the fuse box and tighten screws .
on the fuse box and tighten screws . Fold back bar and tighten screws .
and tighten screws . If present, engage hoses in the retaining clips in the engine compartment and vehicle body.
in the retaining clips in the engine compartment and vehicle body. If present, engage hoses in the retaining clips on the fuse box and vehicle body.
in the retaining clips on the fuse box and vehicle body. If present, insert electrical component into the holder on the fuse box lid and tighten screws .
into the holder on the fuse box lid and tighten screws . Insert cover and engage the rotary catches.
and engage the rotary catches.