Notes on regularly inspecting wheels and tyres
WARNING Risk of accident from damaged tyres
Damaged tyres can cause tyre pressure loss.
As a result, you could lose control of your vehicle.
Check the tyres regularly for signs of damage and replace any damaged tyres immediately.
Check the wheels and tyres of your vehicle for damage regularly, i.e. at least every two weeks, as well as after driving off-road or on rough roads. Damaged wheels can lead to a loss of tyre pressure.
Look out for the following types of damage, for example:
cuts in the tyres
punctures in the tyres
tears in the tyres
bulges on tyres
deformation or severe corrosion on wheels
WARNING Risk of aquaplaning due to insufficient tyre tread
Insufficient tyre tread will result in reduced tyre grip. The tyre tread is no longer able to dissipate water.
This means that in heavy rain or slush the risk of aquaplaning is increased, in particular where speed is not adapted to suit the conditions.
If the tyre pressure is too high or too low, tyres may exhibit different levels of wear at different locations on the tyre tread.
Thus, you should regularly check the tread depth and the condition of the tread across the entire width of all tyres.
Minimum tread depth for:
Summer tyres: 3 mm
M+S tyres: 4 mm
For safety reasons, replace the tyres before the legally prescribed limit for the minimum tread depth is reached.
Conduct the following checks regularly on all wheels, at least once a month or as required, e.g. before a long journey or when driving off-road:
check the tyre pressure More
check the valve caps
Valves must be protected from moisture and dirt with valve caps specifically approved by Mercedes-Benz for your vehicle.
visually inspect the tread depth and the tyre tread across the whole tyre width
For summer tyres, the minimum tread depth is 3 mm and for winter tyres 4 mm.
Notes on snow chains
For safety reasons, Mercedes-Benz recommends that you only use snow chains that have been checked and approved. You can find further information on snow chains recommended for Mercedes-Benz in the wheel and tyre overview at Homepage Mercedes-Benz.
NOTEDamage to the wheel trim from fitted snow chains
If snow chains are fitted to steel wheels, the wheel trims can be damaged.
Remove the wheel trims of steel wheels before fitting snow chains.
Observe the following notes when using snow chains:
Snow chains are only permissible for certain wheel/tyre combinations. You can obtain information on them at a qualified specialist workshop.
For safety reasons, only use snow chains that have been specifically approved for your vehicle by Mercedes-Benz , or snow chains with the same quality standard.
The snow chains must be retightened after driving approximately 1 km. This is the only way to ensure the snow chains are optimally seated with clearance to adjacent components.
Use snow chains only when the road surface is completely snow-covered. Remove the snow chains as soon as possible when you come to a road that is not snow-covered.
Local regulations may restrict the use of snow chains. Observe the applicable regulations before fitting snow chains.
If snow chains are fitted, the maximum permissible speed is 50 km/h.
Notes on windscreen washer fluid
Observe the notes on operating fluids More.
WARNING ‑ Risk of fire and injury due to windscreen washer concentrate
Windscreen washer concentrate is highly flammable. It could ignite if it comes into contact with hot engine component parts or the exhaust system.
Make sure that no windscreen washer concentrate spills out next to the filler opening.
NOTE Damage to the exterior lighting due to unsuitable windscreen washer fluid
Unsuitable windscreen washer fluids may damage the plastic surface of the exterior lighting.
Only use windscreen washer fluids which are also suitable for use on plastic surfaces, e.g. MB SummerFit or MB WinterFit.
NOTEBlocked spray nozzles caused by mixing windscreen washer fluids
Do not mix MB SummerFit and MB WinterFit with other windscreen washer fluids.
Do not use distilled or de-ionised water. Otherwise, the fill level sensor may give a false reading.
Recommended windscreen washer fluid:
Above freezing point: e.g. MB SummerFit
Below freezing point: e.g. MB WinterFit
For the correct mixing ratio, refer to the information on the anti-freeze container.
Mix the washer fluid with windscreen washer fluid all year round.
Filling up the windscreen washer system
WARNING Danger of burns when opening the bonnet
If you open the engine bonnet when the engine has overheated or during a fire in the engine compartment, you could come into contact with hot gases or other escaping operating fluids.
Before opening the bonnet, allow the engine to cool down.
In the event of a fire in the engine compartment, keep the engine bonnet closed and call the fire service.
WARNING Risk of injury due to moving parts
Components in the engine compartment may continue running or start up suddenly, even if the ignition is switched off.
Make sure of the following before performing tasks in the engine compartment:
Switch the ignition off.
Never reach into the danger zone surrounding moving components, e.g. the rotation area of the fan.
Remove jewellery and watches.
Keep items of clothing and hair away from moving parts.
WARNING Risk of fire and injury from windscreen washer concentrate
Windscreen washer concentrate is highly flammable.
Avoid fire, naked flames, smoking and the creation of sparks when using windscreen washer concentrate.
WARNING Risk of burns from hot component parts in the engine compartment
Certain components in the engine compartment can be very hot, e.g. the engine, the radiator and parts of the exhaust system.
Allow the engine to cool down and only touch component parts described in the following.
If you have to carry out any work in the engine compartment, touch only the following components:
bonnet
dipstick
engine oil filler opening cap
washer fluid reservoir cap
coolant expansion reservoir cap
NOTE Damage to the exterior lighting due to unsuitable windscreen washer fluid
Unsuitable windscreen washer fluids may damage the plastic surface of the exterior lighting.
Only use windscreen washer fluids that are also suitable for use on plastic surfaces, e.g. MB SummerFit or MB WinterFit.
Topping up the washer fluid
Washer fluid reservoir (example)
Pre-mix the washer fluid in the correct mixing ratio in a container.
Open the bonnet More.
Pull cap 
of the washer fluid reservoir upwards by the tab.
of the washer fluid reservoir upwards by the tab. Pour in the pre-mixed washer fluid.
Push cap onto the filler opening until it audibly engages.
onto the filler opening until it audibly engages. Close the bonnet More.
Mix the washer fluid with windscreen washer concentrate all year round. Observe the further information on windscreen washer fluid under "Operating fluids and capacities" More.
Replacing the windscreen wiper blades
WARNING Risk of becoming trapped if the windscreen wipers are switched on while wiper blades are being replaced
If the windscreen wipers begin to move while you are changing the wiper blades, you can be trapped by the wiper arm.
Always switch off the windscreen wipers and ignition before changing the wiper blades.
NOTE Damage to the windscreen or rear window during wiper blade replacement
If the wiper arm on the windscreen or rear window is folded back before a wiper blade has been fitted, the window may be damaged by the force of the impact.
Never fold the wiper arm on the windscreen or rear window back until a wiper blade has been fitted. Keep hold of the wiper arm when replacing a wiper blade.
NOTE Damage to bonnet or windscreen wipers when opening the bonnet
If the windscreen wipers have been folded back from the windscreen when the bonnet is opened, the windscreen wipers or the bonnet may be damaged.
Ensure that the windscreen wipers have not been folded back from the windscreen.
Removing the wiper blades
Fold the wiper arms away from the windscreen.
Hold the wiper arm with one hand. With the other hand, turn the wiper blade in the direction of arrow away from the wiper arm as far as it will go.
away from the wiper arm as far as it will go. Slide catch 
in the direction of arrow 
until it engages in the removal position.
in the direction of arrow until it engages in the removal position. Remove the wiper blade from the wiper arm in the direction of arrow 
.
. Fitting the wiper blades
Insert the new wiper blade into the wiper arm in the direction of arrow .
. Slide catch in the direction of arrow until it engages in the locking position.
in the direction of arrow until it engages in the locking position. Make sure that the wiper blade is seated correctly.
Fold the wiper arms back onto the windscreen.
Maintenance display
Remove the protective film from the maintenance displays on the tips of the newly fitted wiper blades.
from the maintenance displays on the tips of the newly fitted wiper blades. If the colour of the maintenance display changes from black to yellow, the wiper blades should be replaced.
The time until the colour changes varies depending on the usage conditions.