2016 MERCEDES-BENZ CLA engine

Problem
Possible causes/consequences and P Solutions
You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
Doors
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position PR
Start the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
You should preferably place luggage or loads
in the cargo compartment. Observe the load-
ing guidelines ( Y
page 272).
Unlocking and opening doors from
the inside
! The side windows will not open/close if
the battery is discharged or if the side win-
dows have iced up. It will then not be pos- sible to close the door. Do not attempt to
force the door closed. You could otherwise
damage the door or the side window.
When a door is opened, the side window on
that side opens slightly. When the door is
closed, the side window closes again.
X
To unlock and open a front door: pull
door handle D .
If the door is locked, locking knob C pops
up. The door is unlocked and opens. X
To unlock a rear door: pull up locking
knob C .
The door is unlocked and can be opened. X
To open a rear door: pull door handle D .
You can open a door from inside the vehicle
even if it has been locked. You can only open
the rear doors from inside the vehicle if they
are not secured by the child-proof locks
( Y
page 64).
If the vehicle has previously been locked with
the SmartKey from the outside, opening a
door from the inside will trigger the anti-theft Doors 83
Opening and closing Z

Unlocking the driver's door (mechan-
ical key) If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered ( Y
page 73).X
Take the mechanical key out of the Smart-
Key ( Y
page 78).X
Insert the mechanical key into the lock of
the driver's door as far as it will go.
X
Turn the mechanical key counter-clockwise
as far as it will go to position G .
The door is unlocked. X
Turn the mechanical key back and remove
it. X
Insert the mechanical key into the Smart-
Key ( Y
page 79).
Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey or KEYLESS-GO, use the mechani-
cal key. X
Open the driver's door. X
Close the front-passenger door, the rear
doors and the trunk lid. X
Press the locking button on the driver’s
door ( Y
page 84).X
Check whether the locking knobs on the
front-passenger door and the rear doors are still visible. Press down the locking
knobs by hand, if necessary. X
Close the driver's door. X
Take the mechanical key out of the Smart-
Key ( Y
page 78). X
Insert the mechanical key into the lock of
the driver's door as far as it will go.
X
Turn the mechanical key clockwise as far as
it will go to position G .X
Turn the mechanical key back and remove
it. X
Make sure that the doors and the trunk lid
are locked. X
Insert the mechanical key into the Smart-
Key ( Y
page 79).
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed.
Trunk
Important safety notes
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open. Trunk 85
Opening and closing Z

G WARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the "Vehicle data" section
( Y
page 371).
You should preferably place luggage or loads
in the trunk. Observe the loading guidelines
( Y
page 272).
Do not leave the SmartKey in the trunk. You
could otherwise lock yourself out.
The trunk lid can be: R
opened and closed manually from outside R
opened automatically from outside R
opened automatically from inside R
released with the emergency release from
the inside
Opening/closing from outside
Opening X
Press the 6 button on the key. X
Pull handle C . X
Raise the trunk lid.
Closing X
Pull down the trunk lid using handle C .X
Let the trunk lid drop into the lock. X
If necessary, lock the vehicle with the 7
button on the SmartKey or with KEYLESS-
GO.
Opening automatically from outside
Important safety notes
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
i The opening dimensions of the trunk lid
can be found under "Vehicle data"
( Y
page 371).86
Trunk
Opening and closing

Opening automatically You can open the trunk lid automatically
using the SmartKey or the handle in the trunk
lid. X
Press and hold the T button on the
SmartKey until the trunk lid opens.
or X
If the trunk lid is unlocked, pull the trunk lid
handle and let it go again immediately.
Opening automatically from inside
Important safety notes
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found under "Vehicle data" ( Y
page 371).
Opening
You can open the trunk lid from the driver's
seat when the vehicle is stationary and
unlocked. X
To open: pull remote operating switch C
for the trunk lid until the trunk lid opens.
Emergency release
General notes
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
The opening dimensions of the trunk lid can
be found in the "Vehicle data" section
( Y
page 371).
If the trunk lid can no longer be unlocked: R
using the SmartKey, or R
using the remote operating switch in the
door control panel:
Use the emergency release on the inside of
the trunk lid.
You can reach the emergency release via the
trunk.
Opening Trunk 87
Opening and closing Z

X
Turn the SmartKey to position 1 or 2 in the
ignition lock ( Y
page 147).X
Press or pull the W switch in the corre-
sponding direction.
If you press/pull the W switch beyond the
point of resistance, automatic operation is
started in the corresponding direction. You
can stop automatic operation by pressing/
pulling the switch again.
After opening the sliding sunroof, the roller
sunblind closes slightly automatically. This
reduces drafts in the vehicle interior.
If the sliding sunroof is raised at the rear, it
lowers slightly automatically at higher
speeds. The noise level in the vehicle interior
is reduced as a result.
At low speeds it raises again automatically.
You can also temporarily deactivate auto-
matic lowering. To do so, press the W
switch. The sliding sunroof raises again auto-
matically.
You can continue to operate the sliding sun-
roof after switching off the engine or remov-
ing the SmartKey from the ignition lock. This
function remains active for five minutes or
until you open a front door.
The sliding sunroof cannot be opened if a roof
carrier is installed. In order to allow ventila-
tion of the vehicle interior, you can raise the
sliding sunroof.
If contact is made with a roof carrier approved
by Mercedes-Benz, the sliding sunroof lowers
slightly but remains raised at the rear.
Rain-closing feature
The rain-closing feature is only available for
vehicles with a rain sensor.
When the SmartKey is in position 0 in the
ignition lock or is removed, the sliding sunroof
closes automatically: R
if it starts to rain. R
at extreme outside temperatures. R
after six hours. R
if there is a malfunction in the power sup-
ply.
The panorama roof with power tilt/sliding
panel remains raised at the rear in order to
allow ventilation of the vehicle interior.
If the panorama roof with power tilt/sliding
panel is obstructed while being closed by the
rain-closing feature, it opens again slightly.
The rain-closing feature is then deactivated.
The panorama roof with power tilt/sliding
panel does not close if: R
it is raised at the rear. R
it is blocked. R
no rain is falling on the area of the wind-
shield being monitored by the rain sensor.
If the vehicle is under a bridge or in a car-
port, for example, the field of the sensor
may be covered.
Operating the roller sunblind for the
panorama roof with power tilt/sliding
panel
Important safety notes
G WARNING
Parts of the body could become trapped
between the roller sunblind and frame or slid-
ing sunroof during automatic opening or clos-
ing. There is a risk of injury.
When opening or closing, make sure that no
body parts are in the sweep of the roller sun-
blind.
If somebody becomes trapped: R
release the switch immediately, or R
during automatic operation, push the
switch briefly in any direction
The opening or closing procedure will be stop-
ped.
The roller sunblind shields the vehicle interior
from sunlight. The roller sunblind can only be
opened and closed when the panorama roof
with power tilt/sliding panel is closed.94
Panorama roof with power tilt/sliding panel
Opening and closing

Useful information
i This Operator's Manual describes all
models and all standard and optional equip-
ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops ( Y
page 25).
Correct driver's seat position
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steering wheel or mirrors R
fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt
before starting the engine. X
Observe the safety guidelines on seat
adjustment ( Y
page 101). X
Make sure that seat

The seat belt should: R
fit snugly across your body R
be routed across the middle of your
shoulder R
be routed in your pelvic area across the
hip joints X
Before starting off, adjust the rear-view mir-
ror and the exterior mirrors ( Y
page 107) in
such a way that you have a good view of
road and traffic conditions. X
Vehicles with a memory function: save
the seat and exterior mirror settings
( Y
page 110).
Seats
Important safety notes
G WARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The seats can still be adjusted when there is
no SmartKey in the ignition lock.
G WARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
Observe the safety notes on "Air bags"
( Y
page 48) and "Children in the vehicle"
( Y
page 58).
G WARNING
If the driver's seat is not engaged, it could
move unexpectedly while the vehicle is in
motion. This could cause you to lose control of
the vehicle. There is a risk of an accident. Always make sure that the driver's seat is
engaged before starting the vehicle.
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steering wheel or mirrors R
fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt
before starting the engine.
G WARNING
If you adjust the seat height carelessly, you or
other vehicle occupants could be trapped and
thereby injured. Children in particular could
accidentally press the electrical seat adjust-
ment buttons and become trapped. There is a
risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustment sys-
tem.
! To avoid damage to the seats and the seat
heating, observe the following information: R
keep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible. R
if the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not be used to dry
the seats. R
clean the seat covers as recommended;
see the "Interior care" section. R
do not transport heavy loads on the
seats. Do not place sharp objects on the
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible. R
when the seat heating is in operation, do
not cover the seats with insulating mate- Seats 101
Seats, steering wheel and mirrors Z

Problems with the seat heating Problem
Possible causes/consequences and P Solutions
The seat heating has
switched off prema-
turely or cannot be
switched on. The on-board voltage is too low because too many electrical con-
sumers are switched on. X
Switch off electrical consumers that you do not need, such as
the rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating will
switch back on automatically.
Steering wheel
Important safety notes
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steering wheel or mirrors R
fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt
before starting the engine.
G WARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
Adjusting the steering wheel
G WARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is a risk of an
accident. Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
C
Release lever D
Adjusts the steering wheel height