2022 MERCEDES-BENZ A-CLASS SALOON Owners Manual

Activating/deactivating the HOLD function
&
WARNING Risk of an accident due t o the
HOLD function being active when you
leave the vehicle
If the vehicle is only braked with the HOLD
function it could, in t
he following situations,
roll away:
= If there is a malfunction in the system or in
the power supply.
= If the HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. by a vehicle occupant. 
Always secure the vehicle against rolling
a
way before you leave it. Requirements:
= The v

ehicle is stationary.
= The driver's door is closed or the seat belt on
the driver's side is fastened.
= The vehicle has been started or has been
automatically switched oM by the ECO start/
stop function. =
The electr
ic parking brake is released.
= Active Distance Assist DISTRONIC is deactiva-
ted.
= The transmission is in position h, k or i.
(Vehicles with automatic transmission)
Activating the HOLD function 
Depress the brake pedal, and aser a shor
t
time quickly depress further until the

locked until you have deactivated the HOLD func-
tion.
%
Once you have switched oM t he vehicle, you
cannot restart it until you have deactivated
the HOLD function. Function of Hill Start Assist
Hill Start Assist holds the vehicle for a short time
when pulling a

way on a hill under the following
conditions:
= The transmission is in position h or k.
(Vehicles with automatic transmission)
= The electric parking brake is released.
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 away. &
WARNING Risk of accident and injur
y due
to the vehicle rolling away
Aser a shor
t time, Hill Start Assist no longer
holds the vehicle. 
Swisly mo
ve your foot from the brake
pedal to the accelerator pedal. Do not
leave the vehicle when it is being held by
Hill Start Assist. Function of Adaptive Brake Lights
Adaptive Brake Lights warn following
tr
aPc in an
emergency braking situation with the following
actions:
= Oashing the brake lamps
= activating the hazard warning lights
( page 134)
If the vehicle is braked sharply from speeds above
50 km/h, the brake lamps Oash rapidly. This pro-
vides traPc travelling behind you with an even
more noticeable warning. Start-oM
assis
t Function of the s

tart-oM assist
The start-oM assist enables optimal vehicle accel-
eration from a standstill. For this, a suitably high- grip road surface is required, the tyres and vehicle
mus

t also be in good condition.
Do not activate the start-oM assist on public
roads.
Be sure to observe the safety notes and informa-
tion on ESP n
( page 219).
Activating the start-oM assist &
WARNING Risk of skidding and ha
ving an
accident from wheels spinning
When you use s
tart-oM assist, individual
wheels could spin and you could lose control
of the vehicle.
If ESP n
is deactivated, there is a risk of skid-
ding and accident! 
Make sure that no persons or obstacles
ar
e in the close vicinity of your vehicle. 
Deactivating ESP n
( pag
e 220). 
Move the steering wheel to the straight-ahead
position. Driving and parking
223


Depress the brake pedal Nr mly with your les
foot and keep it depressed. 
Engage the h dr
ive position ( page 180).
Select the sportiest available drive program
B or C(  pag

e 174).
Rapidly depress the accelerator pedal fully. 
Take your foot oM t
he brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum accelera-
tion. 
Switch on ESP n
once t
he acceleration proce-
dure is complete. ESP n
will otherwise not be
able to stabilise the vehicle if the vehicle
starts to skid or a wheel starts to spin.
Cancelling the s
tart-oM assist 
Remove your foot from the accelerator pedal. 
Reactivate the ESP n
. ATTENTION ASSIST
Function of ATTENTION ASSIST
A

TTENTION ASSIST assists you on long, monoto-
nous journeys, e.g. on motorways and trunk roads. If ATTENTION ASSIST detects indicators of
f
atigue or increasing lapses in concentration on
the part of the driver, it suggests taking a break.
ATTENTION ASSIST is only an aid. It cannot
always detect fatigue or lapses in concentration in
time. The system is not a substitute for a well-res-
ted and attentive driver. On long journeys, take
regular breaks in good time that allow for ade-
quate recuperation.
You can choose between two settings:
= Standard: normal system sensitivity.
= Sensitive: higher system sensitivity. The driver
is warned earlier and the attention level detec-
ted by ATTENTION ASSIST is adapted accord-
ingly.
If drowsiness or increasing lapses in concentra-
tion are detected, the ATTENTION ASSIST Take
a break! warning appears in the Instrument Dis-
play. You can acknowledge the message and take
a break where necessary. If you do not take a
break and ATTENTION ASSIST continues to detect
increasing lapses in concentration, you will be
warned again aser a minimum of 15 minutes. You can have the following status information for
A

TTENTION ASSIST displayed in the assistance
menu of the on-board computer:
= The length of the journey since the last break.
= The attention level determined by ATTENTION
ASSIST:
- the fuller the circle, the higher the atten-
tion level determined
- as your attention wanes, the circle in the
centre of the display becomes smaller
If ATTENTION ASSIST is unable to calculate the
attention level and cannot issue a warning, the
System suspended message appears.224
Driving and parking

If a warning is given in the Instrument Display, the
multimedia sy stem oMers to search for a rest
area. You can select a rest area and start naviga-
tion to this rest area. This function can be activa-
ted and deactivated in the multimedia system.
If ATTENTION ASSIST is deactivated, the Û
symbol appears in the assistance graphic in the
Instrument Display. Aser the vehicle is started,
ATTENTION ASSIST is automatically activated. The
last selected sensitivity level remains stored.
System limits
ATTENTION ASSIST is active in the 60 km/h to
200 km/h speed range.
Particularly in the following situations, ATTENTION
ASSIST only functions in a restricted manner and
warnings may be delayed or not occur:
= If you have been driving for less than approx-
imately 30 minutes.
= If the road condition is poor (uneven road sur-
face or potholes).
= If there is a strong side wind.
= If you adopt a sporty driving style (high corner-
ing speeds or high rates of acceleration). =
If A ctive Steering Assist is activated and active
( page 235).
= If the time has been set incorrectly.
= If you change lanes and vary your speed fre-
quently in active driving situations.
The ATTENTION ASSIST drowsiness or alertness
assessment is reset and restarted when continu-
ing the journey in the following situations:
= If you switch oM the vehicle.
= If you unfasten your seat belt and open the
driver's door (e.g. to change drivers or take a
break).
Setting ATTENTION ASSIST
Multimedia system:
4 © 5
Settings 5
Assistance
5 Attention Assist
Setting options 
Select Standard, Sensitive or Off.
Suggesting a rest area 
Select Suggest rest area . 
Activate or deactivate the function.
If A TTENTION ASSIST detects fatigue or
increasing lack of attention, it suggests a rest
area in the vicinity. 
Select the suggested rest area.
Y
ou are guided to the selected rest area. Cruise control and limiter
Function of cruise control
Cr

uise control regulates the speed to the value
selected by the driver.
If you accelerate to overtake, forexample, the
stored speed is not deleted. If you remove your
foot from the accelerator pedal aser overtaking,
cruise control will resume speed regulation back
to the stored speed.
You can store any speed above 20 km/h up to the
maximum design speed or up to the set winter
tyre limit.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers (  page 216). Driving and parking
225

Mercedes!

The variable limiter is reactivated in the following
situations:
= If t
he vehicle speed drops below the stored
speed.
= If the stored speed is called up.
= If you store a new speed.
Operating cruise control or the variable limiter &
WARNING Risk of accident due t
o stored
speed
If you call up the stored speed and this is
lo
wer than your current speed, the vehicle
decelerates. 
Take into account the tr
aPc situation
before calling up the stored speed. Requirements:
Cr

uise control
= Cruise control is selected.
= ESP n
must be activated, but not intervening.
= The vehicle speed is at least 20 km/h.
= The transmission is in position h.Variable limiter
= The v

ariable limiter is selected. 
To operate cruise control or the variable lim-
it

er: press the rocker switch on the steering
wheel control unit up or down to the desired
position.
Switching between cruise control and the varia-
ble limit
er 
To select cruise control: select J wit
h the
right rocker switch. 
To select the variable limiter: select

When you activate cruise control or Active
Dis
tance Assist DISTRONIC, the last speed
stored for the variable limiter is deleted.
Increasing/decreasing the stored speed 
1 km/h: press rocker switch 1 up M or
do
wn N to the pressure point, or press and
hold (increments of1 km/h).
or 
10 km/h: press rocker switch 1 up M or
do
wn N beyond the pressure point, or
press and hold (increments of10 km/h).
or 
Accelerate the vehicle to the desired speed
and pr

ess rocker switch 1 up M.
Adopting a detected speed 
Activate cruise control or the variable limiter. 
If a tr
aPc sign has been detected and is dis-
played in the instrument cluster: select /
with the les rocker switch.
The maximum permissible speed shown by the
traPc sign is stored and the vehicle maintains
or does not exceed this speed. Deactivating cruise control or the variable limiter 
Select O wit
h the les rocker switch.
% If you brake, deactivate ESP n
or if ESP n
int
er-
venes, cruise control is deactivated. The varia-
ble limiter is not deactivated.
Information on the permanent limiter
If t
he vehicle should never exceed a speciNc
speed (e.g. for driving in winter tyre mode), you
can set this speed with the permanent limiter.
You do this by limiting the speed between
160 km/h and 240 km/h in the multimedia sys-
tem ( page 228).
Shortly before the set speed is reached, it
appears in the Instrument Display. When you con-
Nrm the message, display messages no longer
appear until you switch oM the vehicle. The speed
will only be displayed again once the vehicle has
been restarted or if the set speed is changed.
The permanent limiter does not switch to passive
mode even during kickdown and the driven speed
remains below the set speed. Setting the limit speed for winter tyres
Multimedia sy

stem:
4 © 5
Settings 5
Vehicle
5 Winter tyres limit 
Select a speed or deactivate the function. Active Distance Assist DISTRONIC
Function of Active Distance Assist DISTRONIC
DIS
TRONIC Active Distance Assist maintains the
set speed when driving freely. If vehicles are
detected ahead, the set distance is maintained, if
necessary until the vehicle comes to a standstill.
The vehicle accelerates or brakes depending on
the distance to the vehicle in front and the set
speed. The speed and distance to the vehicle in
front are set and saved using the steering wheel.
Available speed range: = Vehicles without Driving Assistance Package:
20 km/h - 200 km/h
= Vehicles with Driving Assistance Package:
20 km/h - 210 km/h 228
Driving and parking

Other features of Active Distance Assist
DIS
TRONIC:
= Adjusts the driving style depending on the
selected drive program (fuel-saving, comforta-
ble or dynamic)
= Initiates acceleration to the stored speed if the
turn signal indicator is switched on to change
to the overtaking lane
= Vehicles with Driving Assistance Package:
- Reacts to stationary vehicles detected in
urban speed ranges (except bicycles and
motorcycles)
- Takes one-sided overtaking restrictions
into account on motorways or on multi-
lane roads with separate carriageways
(country-dependent)
Vehicles with Driving Assistance Package and
Parking Package: if the vehicle has been braked to
a standstill on multi-lane, separate carriageways
by Active Distance Assist DISTRONIC, it can auto-
matically follow the vehicle in front when driving
oM again within 30 seconds. If a critical situation
is detected when driving oM, a visual and acoustic
warning is given indicating that the driver must now take control of the vehicle. The vehicle is not
acceler ated any further.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers ( page 216).
Active Distance Assist DISTRONIC displays in the
Instrument Display Assistant display
1
Route-based speed adaptation: type of route
e
vent ( page 233)
2 Vehicle in front
3 Distance indicator 4
Set speciNed dis
tance
5 Active Lane Change Assist lane change dis-
pla

y
Permanent status display of Active Distance
Assis
t DISTRONIC
= M (white): Active Distance Assist
DISTRONIC selected, speciNed distance set
= M (white vehicle, green speedometer):
Active Distance Assist DISTRONIC active,
speciNed distance set and vehicle detected
= M (green): Active Distance Assist
DISTRONIC active, speciNed distance set and
vehicle detected
= r: Route-based speed adaptation active
( page 233).
The stored speed is shown along with the perma-
nent status display and highlighted on the speed-
ometer. When Active Distance Assist DISTRONIC
is passive, the speed is greyed out.
% On motorways or high-speed major roads, the
g
reen