Mercedes-Benz GLC Series Operator's Manual page 153

Adapt your driving style to the terrain.
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Do not use the HOLD function on steep
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downhill or uphill gradients with slippery or
loose surfaces.
Driving on sand
When driving on sand, also observe the following
instructions:
Select the F drive program.
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Select a higher vehicle level.
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Shift to a lower gear.
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Drive quickly to overcome the rolling resist‐
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ance; the vehicle may otherwise dig itself in.
Drive in the tracks of other vehicles if possi‐
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ble. Make sure that the following prerequi‐
sites are met:
The tire ruts are not too deep
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The sand is firm enough
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The ground clearance is sufficient
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Fording
Also observe the following information when
fording:
Vehicles with AIR BODY CONTROL: select
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the highest possible vehicle level
( page 208)
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Drive no faster than 6 mph (10 km/h).
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Observe the maximum permissible fording
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depth ( page 360).
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Switch off automatic climate control
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( page 137).
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Ensure that a bow wave does not form as you
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drive.
Do not stop in the water and do not switch
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off the engine. Ensure the ECO start/stop
function is switched off ( page 153).
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Driving in mountainous terrain
Also observe the following information when
driving in mountainous terrain:
Observe the values of the approach/depar‐
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ture angle and of the maximum gradient
( page 360).
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Avoid high engine speeds.
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Driving and parking 151
Use the braking power of the engine when
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driving downhill.
Shift to a lower gear on uphill gradients and
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on long, steep downhill gradients.
Activate DSR before driving downhill, if nec‐
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essary ( page 188).
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Checklist after driving off-road
Driving off-road places greater demands on your
vehicle than driving on normal roads. Check the
entire vehicle for damage and foreign bodies
every time after driving off-road. Foreign bodies
in the wheels or drivetrain can lead to imbalan‐
ces and therefore vibrations.
If the F or G drive program is selec‐
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ted: select another drive program.
Deactivate DSR.
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Lower the vehicle level again to a level suita‐
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ble to the road conditions, e.g. to the normal
level.
Apply the brakes to dry them after fording.
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Check that the service brake is working nor‐
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mally after a long downhill stretch.