Curious - What happens if you are rear ended while HOLD feature engaged?
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 330
Likes: 16
From: North Carolina - Research Triangle
2025 C300W4 AMG, 2023 GLC300 / previous 17 GLC300, 15 BMW 228i, 13 C300, 12 C350 Coupe
Curious - What happens if you are rear ended while HOLD feature engaged?
I have been wondering if MB programmed the HOLD feature to keep the brakes engaged if you are struck from behind. I use it a great deal and worry that I am going to be rear ended and my right foot is going to hit the gas by accident and disengage the brakes. Of course my left foot is flat on the floor since the brakes are engaged.
Has anyone been involved in an accident when the HOLD feature was on?
Has anyone been involved in an accident when the HOLD feature was on?
Senior Member
Joined: Jan 2014
Posts: 479
Likes: 122
From: Raleigh, NC
2021 C63S Coupe
I use hold all the time and I don't have a concern with this. I keep my foot to the side or flat when using it. I also would assume that if you get hit from behind the force is going to try and pull your foot away from the peddle anyway (forcing you into the seat more). The brake is set irregardless.
HOLD function
Driving and
P. This deactivates the HOLD function
HOLD function
General notes
The HOLD function can assist the driver in the
following situations:
following situations:
R
when pulling away, especially on steep
slopes
slopes
R
when maneuvering on steep slopes
R
when waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Important safety notes
G
WARNING
When leaving the vehicle, it can still roll away
despite being braked by the HOLD function if:
despite being braked by the HOLD function if:
R
there is a malfunction in the system or in
the voltage supply.
the voltage supply.
R
the HOLD function has been deactivated by
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant.
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant.
R
the electrical system in the engine
compartment, the battery or the fuses have
been tampered with.
compartment, the battery or the fuses have
been tampered with.
R
the battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
the HOLD function and secure the vehicle
against rolling away.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
the HOLD function and secure the vehicle
against rolling away.
!
If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similar situations:
is activated, the vehicle brakes
automatically in certain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similar situations:
R
when towing the vehicle
R
in the car wash
Deactivating the HOLD function
(Y page 167).
Deactivating the HOLD function
(Y page 167).
166
Driving systems
Driving and
Activation conditions
You can activate the HOLD function if:
R
the vehicle is stationary
R
the engine is running or if it has been
automatically switched off by the ECO
start/stop function
automatically switched off by the ECO
start/stop function
R
the driver's door is closed or your seat belt
is fastened
is fastened
R
the parking brake is released
R
the hood is closed.
R
the transmission is in position D, R or N
R
DISTRONIC PLUS is deactivated
Activating the HOLD function
X
Make sure that the activation conditions
are met.
are met.
X
Depress the brake pedal.
X
Quickly depress the brake pedal further
untilëappears in the multifunction
display.
The HOLD function is activated. You can
release the brake pedal.
untilëappears in the multifunction
display.
The HOLD function is activated. You can
release the brake pedal.
i
If depressing the brake pedal the first
time does not activate the HOLD function,
wait briefly and then try again.
time does not activate the HOLD function,
wait briefly and then try again.
Deactivating the HOLD function
The HOLD function is deactivated
automatically if:
automatically if:
R
you accelerate and the transmission is in
position D or R.
position D or R.
R
the transmission is in position P.
R
you depress the brake pedal again with a
certain amount of pressure untilë
certain amount of pressure untilë
disappears from the multifunction display.
R
you activate DISTRONIC PLUS.
You will see a warning message in the
multifunction display if the HOLD function is
activated and:
You will see a warning message in the
multifunction display if the HOLD function is
activated and:
R
the driver's door is open and the driver's
seat belt is unfastened.
seat belt is unfastened.
R
the engine is switched off, unless it is
automatically switched off by the ECO
start/stop function.
automatically switched off by the ECO
start/stop function.
R
the hood is opened.
Shift to 'P'
X
Shift the transmission to position P to
prevent the vehicle from rolling away.
The HOLD function is deactivated. The
warning message in the multifunction
display disappears.
The horn will also sound at regular intervals if
the HOLD function is activated and you:
prevent the vehicle from rolling away.
The HOLD function is deactivated. The
warning message in the multifunction
display disappears.
The horn will also sound at regular intervals if
the HOLD function is activated and you:
R
switch the engine off, open the driver's
door and remove your seat belt.
door and remove your seat belt.
R
open the hood.
The sounding of the horn alerts you to the fact
that the vehicle has been parked while the
HOLD function is still activated. If you attempt
to lock the vehicle, the tone becomes louder.
The vehicle is not locked until the HOLD
function is deactivated.
The sounding of the horn alerts you to the fact
that the vehicle has been parked while the
HOLD function is still activated. If you attempt
to lock the vehicle, the tone becomes louder.
The vehicle is not locked until the HOLD
function is deactivated.
i
If the engine has been switched off, it
cannot be started again until the HOLD
function has been deactivated.
If there is a malfunction in the system or
power supply while the HOLD function is
activated, the Brake Immediately message
is shown in the multifunction display.
Immediately depress the brake firmly until
the warning message in the multifunction
display goes out.
You can also shift the transmission to position
cannot be started again until the HOLD
function has been deactivated.
If there is a malfunction in the system or
power supply while the HOLD function is
activated, the Brake Immediately message
is shown in the multifunction display.
Immediately depress the brake firmly until
the warning message in the multifunction
display goes out.
You can also shift the transmission to position
P. This deactivates the HOLD function
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 330
Likes: 16
From: North Carolina - Research Triangle
2025 C300W4 AMG, 2023 GLC300 / previous 17 GLC300, 15 BMW 228i, 13 C300, 12 C350 Coupe
Thanks for the reference information. My primary concern is disengaging the HOLD feature when struck from behind. Since hitting the Gas or Brake pedal releases the car from HOLD has Mercedes installed an override that prevents disengagement if the car is struck.
Just curious.
Just curious.
Super Member
Joined: Dec 2010
Posts: 831
Likes: 13
From: N.C. USA
2015, ML250 BlueTEC
HOLD worry---solution
I have been wondering if MB programmed the HOLD feature to keep the brakes engaged if you are struck from behind. I use it a great deal and worry that I am going to be rear ended and my right foot is going to hit the gas by accident and disengage the brakes. Of course my left foot is flat on the floor since the brakes are engaged.
Has anyone been involved in an accident when the HOLD feature was on?
Has anyone been involved in an accident when the HOLD feature was on?
