Wheels and tires -> Notes on regularly inspecting wheels and tires for Your Mercedes GLC Class SUV First generation (2015-2021)

458 Wheels and tires  
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Notes on noise or unusual handling charac‐  
teristics  
Check the tires regularly for signs of  
damage and replace any damaged tires  
immediately.  
Minimum tread depth for:  
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Summer tires: â in (3 mm)  
While driving, pay attention to vibrations, noises  
and unusual handling characteristics, e.g. pulling  
to one side. This may indicate that the wheels or  
tires are damaged. If you suspect that a tire is  
defective, reduce your speed immediately. Stop  
the vehicle as soon as possible to check the  
wheels and tires for damage. Hidden tire dam‐  
age could also be causing the unusual handling  
characteristics. If you find no signs of damage,  
have the tires and wheels checked at a qualified  
specialist workshop.  
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M+S tires: ã in (4 mm)  
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For safety reasons, replace the tires  
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WARNING Risk of aquaplaning due to  
insufficient tire tread  
before the legally prescribed limit for  
the minimum tread depth is reached.  
Insufficient tire tread will result in reduced  
tire grip. The tire tread is no longer able to  
dissipate water.  
This means that in heavy rain or slush the  
risk of hydroplaning is increased, in particu‐  
lar if vehicle speed is not adapted to suit the  
conditions.  
If the tire pressure is too high or too low,  
tires may exhibit different levels of wear at  
different locations on the tire contact sur‐  
face.  
Carry out the following checks on all wheels reg‐  
ularly, at least once a month or as required, e.g.  
prior to a long journey or driving off-road:  
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Check the tire pressure (/ page 460).  
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Visually inspect wheels and tires for damage.  
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Check the valve caps.  
Notes on regularly inspecting wheels and  
tires  
The valves must be protected against mois‐  
ture and dirt by the valve caps approved  
especially for your vehicle by Mercedes-Benz.  
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WARNING Risk of accident from dam‐  
aged tires  
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Visual check of the tire tread depth and the  
tire contact surface across the entire width.  
Thus, you should regularly check the  
tread depth and the condition of the tire  
contact surface across the entire width  
of all tires.  
Damaged tires can cause tire pressure loss.  
As a result, you could lose control of your  
vehicle.  
The minimum tread depth for summer tires is  
â in (3 mm) and for winter tires ã in  
(4 mm).  
Wheels and tires 459  
vehicle by Mercedes-Benz, or snow chains  
with the same quality standard.  
This could cause damage to the vehicle or  
the tires.  
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If snow chains are installed, the maximum  
permissible speed is 30 mph (50 km/h).  
Vehicles with Active Parking Assist: Do  
not use Active Parking Assist when snow  
chains are installed.  
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Never mount snow chains on the front  
wheels.  
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Only mount snow chains on the rear  
wheels in pairs.  
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Vehicles with level control: If snow chains  
are installed, only drive at raised vehicle  
level.  
NOTE Damage to the wheel trim from  
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mounted snow chains  
Six marks 1 show where the bar indicators  
(arrow) are integrated into the tire tread. They  
are visible once a tread depth of approximately  
á in (1.6 mm) has been reached.  
If snow chains are mounted to steel wheels,  
the wheel trims can be damaged.  
You can deactivate ESP® to pull away  
(/ page 190). This allows the wheels to  
spin, achieving an increased driving force.  
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Remove the wheel trims of steel wheels  
before mounting snow chains.  
Observe the following notes when using snow  
chains:  
Notes on snow chains  
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WARNING Risk of accident due to incor‐  
rect mounting of snow chains  
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Snow chains are only permissible for certain  
wheel/tire combinations. You can obtain  
information about this from an authorized  
Mercedes-Benz Center.  
If you have mounted snow chains to the front  
wheels, the snow chains may drag against  
the vehicle body or chassis components.  
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For safety reasons, only use snow chains that  
have been specifically approved for your