Points to observe before use

The maximum roof load that can be used with additional accessories decreases by the dead weight of the crossbars (13.7 lbs/6.2 kg).

Note that installing the crossbar increases the vehicle height by 50 mm compared to the height stated in the "Technical data" section.

The wrench and the Allen key are located with the vehicle tool kit in the stowage space underneath the trunk floor.

Replacement parts are available as Mercedes-Benz accessories. Contact your authorized Mercedes-Benz Service Center.

Installing the crossbars

WARNING  
Please follow these installation instructions carefully. Caution should be exercised to avoid damage to the vehicle while installing the crossbars. Also, be careful not to injure yourself or others while installing and adjusting the crossbars or loading items on them.
Each individual step of the installation instructions, the warning notices, the general safety precautions and the instructions for use must be followed exactly. If the crossbars are not mounted correctly, they and the objects attached to them could come loose from your vehicle and cause an accident, thereby injuring you and other persons and/ or causing damage to property, including damage to your vehicle.

WARNING  
Every time the crossbars are mounted, before you set off on a journey and periodically during longer journeys, check all the screws on the crossbars to make sure that they are secure, and tighten them if necessary. Repeat these checks at regular intervals as roadsurface conditions dictate, and at least after every 1500 miles (2500 km) of continuous use.
Otherwise, the crossbars, mounted accessories and the objects attached to them could come loose from the vehicle causing an accident, thereby injuring you and other persons and/or causing damage to property, including damage to your vehicle.
Do not use lubricant on the screws of the crossbars. The screws could work loose and the crossbars could become detached from your vehicle, together with the objects attached to them causing an accident, thereby injuring you and other persons and/ or causing damage to property, including damage to your vehicle.

WARNING  
Only install the crossbars at the exact locations designated on the roof rails. The designated locations for the front crossbars are between the markings engraved on the inside of the roof rails. The designated locations for the rear crossbars are between the gaps on the roof rails.
Otherwise, the crossbars, mounted accessories and the objects attached to them could come loose from the vehicle causing an accident, thereby injuring you and other persons and/or causing damage to property, including damage to your vehicle.

WARNING  
A roof load creates a greater surface area exposed to the wind and causes the vehicle to have a higher center of gravity, thereby changing the vehicle's driving characteristics.
Accordingly, the additional weight on the roof of the vehicle can have a detrimental effect on braking, cornering and acceleration.
Never exceed the maximum permissible roof load or the maximum permissible vehicle weight, even when accessories for the crossbars (e.g. sk racks, bicycle racks, etc.) are being used. Overloading the vehicle could result in an accident. When calculating the weight placed on the roof please make sure to add the weight of the crossbars, accessory racks and the load carried together.
Always adapt your driving style to the road, traffic and weather conditions, and drive with added caution when the roof is loaded.
Always drive with extreme care when the carrier is loaded. Take into consideration that when the carrier is loaded, the handling characteristics are different from those when operating the vehicle without a carrier loaded.

WARNING  
Do not use accessories which have not been approved by Mercedes-Benz for use in conjunction with these crossbars. If nonapproved accessories are used, these accessories and/or the objects attached to them could come loose from the vehicle, thereby injuring you and other persons and/ or causing damage to property, including damage to your vehicle.

Have a second person assist you when installing the crossbars. Otherwise, the vehicle could be damaged.

Objects that are attached to crossbar system accessories must not limit or obstruct the movement of the sliding sunroof. Otherwise, the tilt/sliding sunroof could be damaged when it is raised.

1 Key
2 Cover cap
3 Sticker FRONT (or REAR)
4 Bolt for clamping bracket
5 Clamping bracket

The front and the rear crossbars differ in length. Attention must therefore be paid to the FRONT or REAR stickers 3 on the crossbars.

► Unlock cover cap 2 with key 1.
► Remove cover cap 2 .

Sticker 3  for identifying the installation location FRONT or REAR becomes visible.

► Turn bolt ? counter-clockwise using the Allen key until clamping bracket A is wide open.

6 Front crossbar
7 Rear crossbar
8 Recesses
9 Markings
10 Roof rails

► Place front crossbar 6 between markings 9 on roof rails 10.

Markings 9 are located on the inside of each roof rail and are marked with white lines.

4 Bolt for clamping bracket
5 Clamping bracket
10 Roof rails

► Ensure that clamping bracket 5 is positioned flush with the inside of roof rails 10.

If necessary, adjust the span of the crossbar.

► Tighten bolt 4 slightly on both sides in a clockwise direction.

► Position rear crossbar 7 on roof rails 10 in such a way that the clamping brackets in recesses 8 reach into the roof rails.

► Ensure that clamping bracket 5 is positioned flush with the inside of roof rails 10.

If necessary, adjust the span of the crossbar.

► Tighten bolt 4 a little on both sides in a clockwise direction.
► Tighten bolts 4 on the front and the rear crossbar. Maintain a tightening torque of 4 lb-ft (6 Nm) .

WARNING  
Have the tightening torque checked after mounting the crossbars. The screws could come loose if they are not tightened to a torque of 4 lb-ft (6 Nm).

► Attach and lock cover caps 2.
► Store the key and the Allen key back in the stowage space underneath the trunk floor.

Adjusting the span of the crossbar

WARNING  
Only install the crossbars at the exact locations designated on the roof rails. The designated locations for the front crossbars are between the markings engraved on the inside of the roof rails. The designated locations for the rear crossbars are between the gaps on the roof rails.
Otherwise, the crossbars, mounted accessories and the objects attached to them could come loose from the vehicle causing an accident, thereby injuring you and other persons and/or causing damage to property, including damage to your vehicle.

The span of the crossbar is adjusted to suit your vehicle at the factory. These spans only fit the intended positions on the vehicle.

Only install the crossbars at the marked points and observe the FRONT and REAR stickers 3.

4 Bolt for clamping bracket
5 Clamping bracket
11 Bolts for adjusting the span (a total of 2 on each side)
12 Cover strip

► Pull out cover strip 12  from the groove until bolts 11 become visible on both ends of the crossbar.
► Turn bolts 11 counter-clockwise on both sides by approx. two turns.
► Place the crossbars on the marked points on the roof rails.
► Ensure that clamping bracket 5 locks flush with the roof rails on both sides. If necessary, pull it out or push it into clamping brackets 5.
► Tighten bolts 11. Maintain a tightening torque of 4 lb-ft (6 Nm) .
The width of the clamping bracket is set correctly.

WARNING  
Have the tightening torque checked after mounting the crossbars. The screws could come loose if they are not tightened to a torque of 4 lb-ft (6 Nm).

► Press cover strip 12 into the groove of the crossbar bit by bit.
► Install the crossbars as described.

Removing the crossbars

1 Key
2 Cover cap
3 Sticker FRONT (or REAR)
4 Bolt for clamping bracket
5 Clamping bracket

► Unlock cover cap 2 with key 1.
► Remove cover cap 2.
► Turn the bolts for clamping bracket 5 counter-clockwise until the crossbars can be removed from the roof rails.

Shortening the cover strip

The cover strips reduce the wind noise that is caused by the crossbars. If additional roof accessories are mounted, it may be necessary to shorten the cover strips.

12 Cover strip

► Pull out cover strip 12 from the groove.
► Mount the roof accessories to the crossbars.
► Place cover strip 12 flush with the roof accessories and mark the end of the crossbar on the cover strip.
► Cut off cover strip 12 at the marked point.
► Press cover strip 12 into the groove of the crossbar bit by bit.

Cover strips are available as Mercedes- Benz accessories. Contact your authorized Mercedes-Benz Service Center.