MERCEDES-BENZ CLA COUPE 2022 Owners Manual


During starting assistance, always take
car
e to connect only battery terminals of
identical polarity. 
During starting assistance, observe the
seq
uence described for connecting and
disconnecting the jump leads. 
Do not connect or disconnect the bat-
t

ery terminals with the engine running. &
WARNING Risk of e
xplosion due to explo-
sive mixture of gases
An explosive mixture of gases can escape
fr
om the battery during charging and starting
assistance. 
Fire, naked Oames, smoking and cr
eating
sparks must be avoided. 
Make sure there is adequate ventilation. 
Do not stand over the battery. &
WARNING Risk of e
xplosion from a frozen
battery
A discharged battery may freeze at tempera-
tur
es slightly above or below freezing point.
During starting assistance or battery charging,
battery gas can be released. 
Always allow a battery to thaw before
c
harging it or performing starting assis-
tance. If the indicator/warning lamps in the instrument
clus
ter do not light up at low temperatures, it is
very likely that the discharged battery has frozen.
In this case you may neither jump-start the vehi-
cle nor charge the battery.
The service life of a battery that has been thawed
may be dramatically shortened. The starting char-
acteristics may be impaired, especially at low
temperatures.
It is recommended that you have a thawed battery
checked at a qualiNed specialist workshop. Plug-in hybrid
If y

our vehicle has been started with starting
assistance, it may not be possible to use the elec-
tric drive for approximately 30 minutes.
Starting assistance is not considered to be a nor-
mal operating condition.
All vehicles
* NOTE Damag
e caused by numerous or
extended attempts to start the engine Numerous or extended attempts to start the
engine ma

y damage the catalytic converter
due to non-combusted fuel. 
Avoid numerous and extended attempts
t

o start the engine. Observe the following points during starting assis-
t
ance and when charging the battery:
= Only use undamaged jump lead/charging
cables with a suPcient cross-section and
insulated terminal clamps.
= Non-insulated parts of the terminal clamps
must not come into contact with other metal 358
Breakdown assistance

parts while the jump lead/charging cable is
connect
ed to the battery/jump-start connec-
tion point.
= The jump lead/charging cable must not come
into contact with any parts which may move
when the engine is running.
= Always make sure that neither you nor the bat-
tery is electrostatically charged.
= Keep away from Nre and naked Oames.
= Do not lean over the battery.
Observe the additional following points when
charging the battery: = Only use battery chargers tested and
approved for Mercedes-Benz.
= Read the battery charger's operating instruc-
tions before charging the battery.
Observe the additional following points during
starting assistance:
= Starting assistance may only be provided
using vehicles, batteries or other jump start
devices with a nominal voltage of 12 V.
= The vehicles must not touch. =
V ehicles with a petrol engine: jump-start the
vehicle only when the engine and exhaust sys-
tem are cold. Starting assistance and charging the 12 V battery
Requirements:
= The v

ehicle is secured with the electric park-
ing brake.
= Vehicles with automatic transmission: the
transmission is in position j.
= Vehicles with manual transmission: the trans-
mission is in neutral.
= The vehicle and all electrical consumers are
switched oM.
= The bonnet is open. Example: engine compartment

Slide cover 1 of POSITIVE cont
act 2 on the
jump-starting connection point in the direction
of the arrow. 
Connect POSITIVE contact 2 on y
our vehicle
to the positive terminal of the donor battery
using the jump lead/charging cable. Always Breakdown assistance
359

begin with POSITIVE contact
2 on y our own
vehicle Nrst. 
During starting assistance: s
tart the engine of
the donor vehicle and run at idle speed. 
Connect the negative terminal of the donor
batt

ery and earth point 3 of your own vehicle
by using the jump lead/charging cable. Begin
with the donor battery Nrst.
During starting assistance: s
tart the engine of
your own vehicle. 
During the charging process: s
tart the charg-
ing process. 
During starting assistance: le
t the engines run
for several minutes. 
During starting assistance: bef
ore disconnect-
ing the jump lead, switch on an electrical con-
sumer on your own vehicle, e.g. the rear win-
dow heater or lighting.
When the starting assistance/charging process is
com
plete, perform the following steps: 
First, remove the jump lead/charging cable
fr
om earth point 3 and the negative terminal of the donor battery, then POSITIVE contact
2 and t

he positive terminal of the donor bat-
tery. Begin each time with the contacts on
your own vehicle Nrst. 
Aser r
emoving the jump lead/charging cable,
close cover 1 of POSITIVE contact 2.
Plug-in hybrid: if y
our vehicle has been started
with starting assistance, it may not be possible to
use the electric drive for approximately 30
minutes.
Further information can be obtained at a qualiNed
specialist workshop. Replacing the 12 V battery

Observe the notes on the 12 V battery
( pag
e 355).
Mercedes-Benz recommends that you have the
12 V batt
ery replaced at a qualiNed specialist
workshop, e.g. at a Mercedes-Benz Service
Centre. Observe the following notes if you want to replace
t

he battery yourself:
= Always replace a faulty battery with a battery
which meets the speciNc vehicle require-
ments.
The vehicle is equipped with an AGM technol-
ogy battery (Absorbent Glass Mat) or a lith-
ium-ion battery. Full vehicle functionality is
only guaranteed with an AGM battery or lith-
ium-ion battery. For safety reasons, Mercedes-
Benz recommends that you only use batteries
which have been tested and approved for your
vehicle by Mercedes-Benz.
= Carry over detachable parts, such as vent
hoses, elbow Nttings or terminal covers from
the battery being replaced.
= Make sure that the vent hose is always con-
nected to the original opening on the side of
the battery.
Fit any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
= Make sure that detachable parts are recon-
nected in the same way. 360
Breakdown assistance

Tow-starting or towing away
Overview of permissible towing methods (not
plug-in h
ybrid) Mercedes-Benz recommends transporting your
v
ehicle in the case of a breakdown, rather than
towing it away.
For towing, use a tow rope or tow bar with both
axles on the ground. Do not use tow bar systems. &
WARNING Risk of accident when t
owing
with steering wheel lock
If the steering wheel lock is engaged, you will
no
t be able to steer the vehicle. 
When towing with a tow rope or tow bar,
alw

ays switch on the vehicle. *
NOTE Damag
e to the vehicle due to tow-
ing away incorrectly 
Observe the instructions and notes on
t

owing away. Permitted towing methods
Vehicle equipment/towing method
Both axles on the ground Front axle raised Rear axle raised
Vehicles with manual transmission Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
Vehicles with automatic transmis-
sion Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
4MATIC vehicles Yes, maximum 50 km at 50 km/h No No Breakdown assistance
361

Towing with a raised axle:
t owing should be per-
formed by a towing company. Overview of permitted towing methods (plug-in
h

ybrid) Mercedes-Benz recommends transporting your
v
ehicle in the case of a breakdown, rather than
towing it away. For towing, use a tow rope or tow bar with both
axles on t

he ground. Do not use tow bar systems.
* NOTE Damag
e to the vehicle due to tow-
ing away incorrectly 
Observe the instructions and notes on
t

owing away. Observe the information on towing and transport-
ing t

he vehicle in the vehicle Owner's Manual.
Permitted towing methods Vehicle equipment/towing method
Both axles on the ground Front axle raised Rear axle raised
Plug-in hybrid vehicles Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
The s
teering wheel must be Nxed in
the centre position with a steering
wheel lock. 362
Breakdown assistance

In the following situations, only transporting the
v ehicle is permitted:
= the multifunction display is not working
or
= the


Information on the permissible gross mass of
t
he vehicle can be found on the vehicle identi-
Ncation plate ( page 391). 
Vehicles with automatic transmission: do no
t
open the driver's door or front passenger
door; the transmission otherwise automati-
cally shiss to position j. 
Fit the towing eye ( pag
e 366).
Fasten the towing device.
* NOTE Damag
e due to incorrect connec-
tion of the tow bar 
Only connect the tow rope or tow bar to
t
he towing eyes. 
Deactivate the automatic locking mechanism
( pag

e 89). 
Do not activate the HOLD function. 
Deactivate tow-away protection
( pag

e 103). 
Deactivate Active Brake Assist ( pag
e 241).
Vehicles with automatic transmission: shis t
o
position i. 
Vehicles with manual transmission: shis t
o
neutral. 
Release the electric parking brake. &
WARNING Risk of accident due t
o limited
safety-related functions during the towing
process
Safety-related functions are limited or no lon-
g
er available in the following situations:
= the vehicle is switched oM.
= the brake system or power steering system
is malfunctioning.
= the energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towed away, signiNcantly
more eMort may be required to steer and
brake than is normally required. 
Use a tow bar. 
Make sure that the steering wheel can
mo

ve freely before towing the vehicle
away. *
NOTE Damag
e due to excessive tractive
power If you pull away sharply, the tractive power
ma

y be too high and the vehicles could be
damaged. 
Pull away slowly and smoothly. Loading the vehicle for transport
Hybrid vehicles:
tr
ansportation of vehicles should
only be carried out by professional recovery com-
panies. 
Observe the notes on towing away
( pag
e 363). 
Connect the towing device to the towing eye
in or

der to load the vehicle.
% You can also attach the tow bar to the trailer
hitc
h. 
Vehicles with automatic transmission: shis t
he
automatic transmission to position i.364
Breakdown assistance

%
Vehicles with automatic transmission: t he
automatic transmission may be locked in posi-
tion j in the event of damage to the electri-
cal system. To shis to i, provide the on-
board electrical system with power
(  page 359). 
Vehicles with manual transmission: shis t
o
neutral. 
Load the vehicle onto the transporter. 
Vehicles with automatic transmission: shis t
he
automatic transmission to position j.
Vehicles with manual transmission: eng
age
Nrst or reverse gear. 
Use the electric parking brake to secure the
v

ehicle against rolling away. 
Only secure the vehicle by the wheels. Vehicles with adaptive damping adjustment &
WARNING Risk of an accident when tr
ans-
porting vehicles with adaptive damping
adjustment
When transporting vehicles with adaptive
dam
ping adjustment, the vehicle/trailer com-
bination may begin to rock and start to skid. 
Load the vehicle correctly onto the
tr
ansporter. 
Secure the vehicle on all four wheels
wit

h suitable tensioning straps. 
Do not exceed the maximum permissible
speed of 60 km/h

when transporting. *
NOTE Damag
e to the vehicle from secur-
ing it incorrectly 
Aser loading, t
he vehicle must be
secured on all four wheels. Otherwise,
the vehicle could be damaged. 
A minimum distance of 20 cm upwards
and 10 cm
downwards must be kept to
the transport platform. 
Secure the vehicle on all four wheels aser
loading.
4MATIC vehicles/vehicles with automatic trans-
mission 
Make sure that the front and rear axles come
t
o rest on the same transportation vehicle.
* NOTE Damag
e to the drive train due to
incorrect positioning of the vehicle 
Do not position the vehicle above the
connection point of t

he transport vehi-
cle. Breakdown assistance
365

Towing eye storage location
The towing hook is in the load compartment
under t
he load compartment Ooor.Fitting and removing the towing eye

Press the mark on cover 1 in
wards and
remove. 
Screw in the towing eye clockwise as far as it
will go and tight

en.
Vehicles with a trailer hitch: v
ehicles with a trailer
hitch do not have a rear bracket for the towing
eye. Fasten the tow bar to the trailer hitch. 
Make sure that cover 1 eng
ages in the
bumper when you remove the towing eye.
* NOTE Damag
e to the vehicle due to incor-
rect use of the towing eye or trailer hitch When a towing eye or trailer hitch is used to
r
ecover a vehicle, the vehicle may be damaged
in the process. 
Only use the towing eye or trailer hitch to
t

ow away or tow start the vehicle. 
Do not use the towing eye or trailer hitch
t

o tow the vehicle during recovery. Tow-starting the vehicle
Vehicles with automatic transmission
* NOTE Damag
e to the automatic transmis-
sion due to tow-starting The automatic transmission may be damaged
in t
he process of tow-starting vehicles with
automatic transmission. 
Vehicles with automatic transmission
mus

t not be tow-started. 
Vehicles with an automatic transmission must
no

t be tow-started.
Vehicles with manual transmission 
Observe the notes on towing away
( pag
e 363). 
If necessary, allow the engine and exhaust
sy

stem to cool down. 
Switch on the ignition. 
Engage second gear. 
Release the electric parking brake. 366
Breakdown assistance


Tow-start the vehicle while the clutch pedal is
full y depressed. 
Slowly release the clutch pedal. 
Immediately shis t
o neutral if the engine
starts. 
Stop the vehicle in accordance with the tr
aPc
conditions. 
Remove the tow bar. 
Remove the towing eye. 
Have the vehicle checked at a q
ualiNed spe-
cialist workshop. Electrical fuses
Notes on electrical fuses
&
WARNING Risk of accident and injur
y due
to overloaded lines
If you manipulate or bridge a faulty fuse or if
y
ou replace it with a fuse with a higher amper-
age, the electric line could be overloaded.
This could result in a Nre. 
Always replace faulty fuses with speci-
Ned ne

w fuses containing the correct
amperage. *
NOTE Damag
e due to incorrect fuses Using incorrect fuses can result in damage to
electr
ical components or systems or their
functions being considerably restricted. 
Use only fuses approved for Mercedes-
Benz wit

h the respective speciNed fuse
rating. Blown fuses must be replaced with fuses of the
same r

ating, which you can recognise by the col-
our and the label. The fuse ratings and further
information to be observed can be found in the
fuse assignment diagram.
Fuse assignment diagram: on the fuse box in the
engine compartment ( page 368). *
NOTE Damag
e or malfunctions caused by
moisture Moisture may cause damage to the electrical
sy
stem or cause it to malfunction. 
When the fuse box is open, make sure
t

hat no moisture can enter the fuse box. 
When closing the fuse box, make sure
t

hat the seal of the lid is positioned cor-
rectly on the fuse box. If the newly inserted fuse also blows, have the
cause tr
aced and rectiNed at a qualiNed specialist
workshop.
Ensure the following before replacing a fuse:
= The vehicle is secured against rolling away.
= All electrical consumers are switched oM.
= The vehicle is switched oM.
The electrical fuses are located in various fuse
boxes: = Fuse box in the engine compartment on the
les-hand side of the vehicle, when viewed in
the direction of travel (  page 368) Breakdown assistance
367