178 Driver assist systems › Front Assist
goes out when deactivated.
Operating conditions
✓ ASR activated.
Troubleshooting
✓ The driving speed is higher than 5 km/h.
ESC or ASR faulty/deactivated by the system
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Functional restriction
Stop the engine and start again.
If the warning light does not go out after covering
a short distance, seek the help of a specialist ga-
rage.
›
The function may be restricted or unavailable in the
following cases.
›
About 30 seconds after starting. Lights up in the
▶
instrument cluster
.
ABS faulty
When driving through a sharp bend.
During an ESC intervention.
▶
▶
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You may continue driving, exercising appro-
priate caution. Get the help of a specialist compa-
ny.
›
Settings
Automatic activation
Front Assist is automatically activated when the igni-
tion is switched on.
Brake system and anti-lock braking system faulty
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Stop driving! Get the help of a specialist
company.
›
Activation / deactivation in the instrument cluster
Press the button on the multifunction steering
wheel.
›
Select Front Assist
.
›
Front Assist
Functionality
Activation / deactivation and setting in Infotain-
ment
In the menu:
Front Assist monitors the distance to the vehicle
ahead and points out when the safety distance is ex-
ceeded. In borderline situations, it helps to avoid a
collision by braking interventions.
Show system deactivation in the display of the in-
strument cluster
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Status display in the instrument cluster display
or
illuminates - safety distance too small
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or
illuminates - warning in case of collision
Deactivate Front Assist when handling the vehi-
cle on a truck, a car ferry etc.
Automatic braking in the event of a collision
If there is a risk of collision, the symbol lights up as a
warning
or
from the isolation box. If you do
Troubleshooting
not respond to the warning, the vehicle will slow
down.
Front Assist is not available
At a driving speed of up to 30 km / h, the vehicle is
braked without prior warning.
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The automatic braking can be stopped by pressing
the accelerator pedal or by steering.
Or:
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With automatic braking, the pressure in the brake
system increases. The brake pedal cannot be operat-
ed by using the pedal as normal.
Clean the front radar sensor.
Stop the engine and start again.
If Front Assist is still unavailable, check the brake
lights on the vehicle or on the attached trailer.
›
›
WARNING
Risk of accident!
›
Front Assist does not respond to crossing or oncom-
ing vehicles.
Replace the defective bulb.
If the brake lights are working and Front Assist is
still unavailable, seek the help of a specialist ga-
rage.
›
›
