Attaching the roof rack
WARNING Risk of injury by exceeding the maximum roof load
When you load the roof, the vehicle centre of gravity rises and the driving characteristics change.
If you exceed the maximum roof load, the driving characteristics, as well as the steering and braking, will be greatly impaired.
Never exceed the maximum roof load and adjust your driving style.
NOTE Vehicle damage from non-approved roof racks
The vehicle could be damaged by roof racks which have not been tested and approved by Mercedes-Benz.
Only use roof racks tested and approved by Mercedes-Benz.
Depending on the vehicle equipment, ensure that when the roof rack is fitted:
the sliding sunroof can be fully raised.
the boot lid can be fully opened.
Position the load on the roof rack in such a way that the vehicle will not sustain damage even when it is in motion.
NOTE Important points to remember when a roof rack is fitted
When a roof rack is fitted, raising or opening the sliding sunroof may be limited.
Check whether the sliding sunroof can be raised or opened when a roof rack is fitted.
If in doubt, do not raise or open the sliding sunroof.
NOTE Damage to the covers
The covers may be damaged and scratched when being opened.
Do not use metallic or hard objects.
Fold covers 
carefully upwards in the direction of the arrow.
carefully upwards in the direction of the arrow. Secure the roof rack to the anchorage points under covers .
. Always comply with the roof rack manufacturer's installation instructions.
Secure the load on the roof rack.
Folding the rear seat backrest forwards
WARNING Risk of injury if the rear bench seat/rear seat and seat backrest are not engaged
If the rear bench seat/rear seat and seat backrest are not engaged they could fold forwards, e.g. when braking suddenly or in the event of an accident.
If this is the case, the vehicle occupant would be forced into the seat belt by the rear bench seat/rear seat or by the seat backrest. The seat belt cannot protect as intended and could result in additional injury.
Objects or loads in the boot cannot be restrained by the seat backrest.
Make sure that the seat backrest and the rear bench seat/rear seat are engaged before every trip.
Requirement:
The rear seat backrest head restraints are fully inserted.
The centre and outer seat backrests can be folded forwards separately.
Left and right seat backrest:
pull release lever . 
Centre seat backrest:
pull release 
of seat backrest 
forwards. Fold the corresponding seat backrest forwards.
Folding the rear seat backrest back
WARNING Risk of injury if the rear bench seat/rear seat and seat backrest are not engaged
If the rear bench seat/rear seat and seat backrest are not engaged they could fold forwards, e.g. when braking suddenly or in the event of an accident.
If this is the case, the vehicle occupant would be forced into the seat belt by the rear bench seat/rear seat or by the seat backrest. The seat belt cannot protect as intended and could result in additional injury.
Objects or loads in the boot cannot be restrained by the seat backrest.
Make sure that the seat backrest and the rear bench seat/rear seat are engaged before every trip.
NOTE Damage to the seat belt
The seat belt could become trapped and thus damaged when folding back the seat backrest.
Make sure that the seat belt is not trapped when folding back the seat backrest.
Move the driver's or front passenger seat forwards, if necessary.
Fold corresponding seat backrest back until it engages.
back until it engages. Left and right seat backrests: if the seat backrest is not engaged and locked, this will be shown in the multifunction display in the instrument cluster.
Centre seat backrest: if the seat backrest is not engaged and locked, red lock verification indicator will be visible.
Opening the stowage space under the boot floor
NOTE Damage to the handle in the boot floor
If the handle in the boot is left protruding, the handle may be damaged.
Unhinge the handle before you close the boot lid and clip it in place.
Pull handle up and hook it into rain trough .
up and hook it into rain trough . Folding the ball neck in/out
WARNING Risk of accident due to the ball neck not being engaged
If the ball neck is not engaged, the trailer may come loose.
Always engage the ball neck as described.
WARNING Risk of injury from ball neck swinging outwards
The ball neck may swing outwards when unlocking or when it has not been properly engaged.
There is a risk of injury within the ball neck's range of movement!
Unlock the ball neck only when its range of movement is unobstructed.
Always be sure the ball neck is engaged when folding inwards.
Requirements:
Before folding the ball neck inward/outward, make sure of the following:
the range of movement is clear
Only when folding inward: ensure trailer cables or adapter plugs have been removed.
Folding the ball neck outwards
Pull release switch until the ball neck unlocks.
until the ball neck unlocks. The ball neck folds out from under the rear bumper.
Indicator lamp flashes.
Pull the ball neck in the direction of the arrow until it engages audibly in a vertical position.
The indicator lamp on the release switch for unlocking the ball neck goes out.
If the ball neck is not securely locked in place, the Check trailer hitch lock display message appears in the multifunction display.
Remove the protective covering from the ball head and store it in a safe place.
Make sure that the ball of the ball neck is clean and that it is either greased or dry (grease free), depending on the instructions for the trailer.
Folding the ball neck inwards
Pull release switch again until the ball neck unlocks.
again until the ball neck unlocks. The ball neck folds up under the rear bumper.
Indicator lamp flashes.
Press the ball neck in the direction of the arrow until it engages audibly behind the bumper.
Indicator lamp on release switch and the message in the multifunction display go out.
Overview of the tie-down eyes
This equipment is only available in vehicles with the through-loading feature in the rear bench seat.
Overview of the front stowage compartments
WARNING Risk of injury from incorrectly stowed objects
If objects in the passenger compartment are stowed incorrectly, they can slide or be thrown around and hit vehicle occupants. In addition, cup holders, open stowage spaces and mobile phone brackets cannot always retain all objects they contain.
There is a risk of injury, particularly in the event of sudden braking or a sudden change in direction.
Always stow objects so that they cannot be thrown around in such situations.
Always make sure that objects do not protrude from stowage spaces, luggage nets or stowage nets.
Close the lockable stowage spaces before starting a journey.
Always stow and secure heavy, hard, pointed, sharp-edged, fragile or bulky objects in the boot.
Observe the notes on loading the vehicle More.
Locking/unlocking the glove box
WARNING Risk of injury from incorrectly stowed objects
If objects in the passenger compartment are stowed incorrectly, they can slide or be thrown around and hit vehicle occupants. In addition, cup holders, open stowage spaces and mobile phone brackets cannot always retain all objects they contain.
There is a risk of injury, particularly in the event of sudden braking or a sudden change in direction.
Always stow objects so that they cannot be thrown around in such situations.
Always make sure that objects do not protrude from stowage spaces, luggage nets or stowage nets.
Close the lockable stowage spaces before starting a journey.
Always stow and secure heavy, hard, pointed, sharp-edged, fragile or bulky objects in the boot.
Observe the notes on loading the vehicle More.
Turn the emergency key a quarter turn clockwise 
(to lock) or anti-clockwise 
(to unlock).
(to lock) or anti-clockwise (to unlock).