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Troubleshooting
288 Fuel and fuel tank
Problem Possible cause/consequence Suggested solutions
Fuel is leaking from the vehicle.
G
Risk of explosion or fire
The fuel line or the fuel tank is
defective. X
Turn the key to position 0(Y page 76) in the ignition lock immedi-
ately and remove it.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The fuel filler flap cannot be
opened. The fuel filler flap is not released.
The batteries in the vehicle key or
the KEYLESS GO key
* are dis-
charged. X
Unlock the vehicle using the emergency key element
(Y page 302).
X Open the tailgate (Y page 71).
X Manually unlock the fuel filler flap via the emergency release
(Y page 303). The fuel filler flap is released, but
the opening mechanism is jam-
med. X
Consult a qualified specialist workshop. Practical advice
* optional
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Locking/unlocking in an emergency
303
X
Turn the emergency key element back and
remove it.
X Pull the door handle again. Locking the vehicle
If the vehicle can no longer be locked cen-
trally with the key or the KEYLESS GO key*:
X Close the front-passenger door, the rear
door on the front-passenger side and the
tailgate.
X Open the driver's door and the rear door on
the driver's side.
X Press the locking button on the driver's
door (Y page 75).
The locking knobs in the front-passenger
door and in the rear doors drop down.
X Press the locking knobs in the front-
passenger and rear doors down manually if
necessary.
X Exit the vehicle.
X Close the driver's door.
X Enter the vehicle through the rear door on
the driver's side.
X Push the locking pin in the driver's door
down from the inside.
X Exit the vehicle. i
Ensure that you have the vehicle key on
your person and that it is not left in the
vehicle, as the vehicle will be locked after
the next step.
X Close the rear door on the driver's side.
The vehicle is locked. Emergency fuel filler flap release
G
Risk of injury
The edges on the inside of the vehicle body
can be sharp. You could injure yourself
when using the fuel filler flap emergency
release. Avoid contact with the edges on
the inside of the vehicle body.
The emergency release is located behind the
right-hand side trim panel in the luggage com-
partment.
X Open the tailgate.
X Open the right-hand side trim panel
(Y page 310). 1
Emergency release
X Pull emergency release 1in the direction
of the arrow.
The fuel filler flap is unlocked.
X Open the fuel filler flap. Practical advice
* optional
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Replacing the wiper blades
311
Changing the bulbs in the licence plate
lamps
Licence plate lamp
1
Screws
X Switch off the lights.
X Open the tailgate.
X Remove screws 1.
X Remove the licence plate lamp.
X Replace the bulb.
X Insert the licence plate lamp.
X Replace and tighten screws 1. Replacing the wiper blades
Windscreen wiper blades
G
Risk of accident
The windscreen will not longer be properly
wiped if the wiper blades are worn. This
could prevent you from observing the traffic
conditions, thereby causing an accident.
Replace the wiper blades twice a year, ide-
ally in spring and autumn. G
Risk of accident
The wiper arms could start moving and
cause an injury if you leave the windscreen
wipers switched on.
Remove the key from the ignition lock
before replacing the wiper blades.
! Make sure that you touch only the wiper
arm of the windscreen wiper to avoid dam-
aging the windscreen wiper blades. Removing 1
Wiper blade
2 Release clips
3 Folding direction
4 Wiper arm
5 To remove the wiper blade
X Remove the key from the ignition lock.
X Fold wiper arm 4away from the wind-
screen until it engages.
X Press both release clips 2.
X Fold wiper blade 1in the direction of
arrow 3.
X Remove the wiper blade in the direction of
arrow 5. Practical advice
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Flat tyre
318
Raising the vehicle G
Risk of injury
The jack is designed only to raise the vehi-
cle for a short time while a wheel is being
changed.
If you intend to work under the vehicle, it
must be placed on stands.
Make sure that the jack is placed on a firm,
non-slip, level surface. Do not use wooden
blocks or similar items as jacking supports.
Otherwise, the jack will not be able to ach-
ieve its load-bearing capacity due to the
restricted height.
Do not start the engine at any time while
the wheel is being changed.
Do not lie under the vehicle when it is being
supported by the jack. If you do not raise
the vehicle as described, it could slip off the
jack (e.g. if the engine is started or a door
or the tailgate is opened or closed) and you
could be seriously injured. G
Risk of accident
If you fail to position the jack correctly, the
vehicle may: R
slip off the jack
R injure you or others
R be damaged
It is thus important to ensure that the jack
is positioned correctly in the respective
jacking points. Before positioning the jack,
remove any dirt that may have collected in
the jacking points. 1
Wheel wrench
X Using wheel wrench 1, loosen the bolts on
the wheel you wish to change by about one
full turn. Do not unscrew the bolts com-
pletely.
The jacking points for the jack are located
behind the wheel housings of the front wheels and in front of the wheel housings of the rear
wheels (arrows). 1
Jacking point
2 Jack
3 Ratchet ring spanner
X Position jack 2at jacking point 1. Practical advice
251_AKB; 5; 7, en-GB
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Fuses
334 Before changing a fuse
X Park the vehicle.
X Switch off all electrical consumers.
X Remove the key from the ignition lock. Dashboard fuse boxes
1
Cover
! Do not use a pointed object such as a
screwdriver to open the cover in the dash-
board. You could damage the dashboard or
the cover.
X To open: open the front-passenger door.
X Pull cover 1upwards in the direction of
the arrow and remove it. X
To close: clip in cover 1at the top.
X Fold cover 1inwards until it engages.
X Close the front-passenger door. Fuse box in the engine compartment
1
Retaining clamp
2 Cover
X To open: open the bonnet (Y page 220).
X Remove moisture from the fuse box using
a dry cloth.
X Open retaining clamp 1.
X Fold cover 2upwards.
X To close: replace cover 2. !
The cover must be fitted properly, other-
wise moisture or dirt could affect the oper-
ation of the fuses.
X Close retaining clamp 1.
X Close the bonnet (Y page 221). Fuse box in the luggage compartment
Example: vehicle with an emergency spare
wheel*
1
Cover
X To open: open the tailgate.
X Open the luggage compartment floor and
secure it (Y page 250).
X Fold cover 1to the left in the direction of
the arrow. Practical advice
* optional
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Vehicle weights
351Tailgate opening dimensions
1
Max. headroom
2 Tailgate opening height Vehicle level
52 1
1 2
2 191 cm 204 cm
!
In vehicles with the AIRMATIC package*,
the tailgate opening dimensions may vary
depending on the selected basic setting
and current vehicle level.
Therefore, make sure that there is suffi-
cient clearance above the tailgate. Vehicle weights
The unladen weight includes the driver (68 kg), luggage (7 kg) and all fluids (fuel tank 90% full). Items of optional equipment increase the
unladen weight and reduce the maximum payload. Specific weight specifications can be found on the vehicle identification plate
(Y page 340). Short wheelbase R 280 R 350 R 350 4MATIC R 500 4MATIC
Unladen weight (in accordance with EC
directive) 2,130 kg 2,130 kg 2,180 kg 2,220 kg
Maximum permissible gross vehicle
weight 2,790 kg 2,790 kg 2,840 kg 2,880 kg
Maximum permissible front axle load 1,370 kg 1,370 kg 1,370 kg 1,370 kg
52
Values are rounded off and valid for unladen vehicles with basic equipment. Technical data
251_AKB; 5; 7, en-GB
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