Mercedes-Benz S-Class 2019 Operator's Manual page 216

214 Driving and parking
Information on Hill Start Assist
Hill Start Assist holds the vehicle for a short
time when pulling away on a hill under the fol‐
lowing conditions:
The transmission is in position h or k.
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The electric parking brake is released.
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This gives you enough time to move your foot
from the brake pedal to the accelerator pedal
and depress it before the vehicle begins to roll.
& WARNING Risk of accident and injury
due to the vehicle rolling away
After a short time, Hill Start Assist no longer
holds the vehicle and it can roll away.
Therefore, swiftly move your foot from
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the brake pedal to the accelerator
pedal. Never attempt to leave the vehi‐
cle if it is being held by Hill Start Assist.
HOLD function
HOLD function
The HOLD function holds the vehicle at a stand‐
still without requiring you to depress the brake
pedal, e.g. while waiting in traffic.
System limitations
The HOLD function is only intended to provide
assistance when driving and is not a sufficient
means of safeguarding the vehicle against rolling
away when stationary.
The incline must not be greater than 30%.
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Activating/deactivating the HOLD function
& WARNING Risk of an accident due to the
HOLD function being activated when you
leave the vehicle
If you leave the vehicle while only the HOLD
function is braking the vehicle, the vehicle
can roll away in the following situations:
If there is a malfunction in the system or
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in the power supply.
If the HOLD function is deactivated by
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depressing the accelerator pedal or brake
pedal, e.g. by a vehicle occupant.
Always deactivate the HOLD function
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and secure the vehicle against rolling
away before leaving the vehicle.
* NOTE Damage from automatic braking
When Active Brake Assist, Active Distance
Assist DISTRONIC or the HOLD function are
activated, the vehicle brakes autonomously
in certain situations.
To avoid damage to the vehicle, deactivate
these systems in the following or similar sit‐
uations:
During towing
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In a car wash
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Requirements:
The vehicle is stationary.
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The driver's door is closed or the seat belt on
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the driver's side is fastened.