Hybrid drive system Problem
Possible causes/consequences and P Solutions
The hybrid drive system
has been switched off
automatically. You have been in an accident.
The hybrid drive system remains switched off if: R
the internal combustion engine cannot be restarted after a few
seconds. R
the red u restraint system warning lamp in the instrument clus-
ter is lit. X
Consult a qualified specialist workshop.
The hybrid drive system
has been switched off
automatically. The multi-
function display also
shows a display mes-
sage. An electrical short circuit has occurred in the hybrid drive system or an
electrical connection has been disconnected. X
Observe the additional display messages in the multifunction dis-
play (see the vehicle Operator's Manual). X
Consult a qualified specialist workshop.
Driving tips
General driving tips Drive carefully and maintain a safe distance
from the vehicle in front. Avoid frequent and
sudden acceleration as well as abrupt braking.
During partial electric driving, pulling away and
acceleration, the electric motor supports the
internal combustion engine.
During overrun in transmission position D and
braking, the electric motor will operate as a gen-
erator.
Further information on the ECO start/stop func-
tion ( Y
page 23).
You can find further driving tips in the vehicle
Operator's Manual.
Stationary vehicle If the vehicle is stopped, the combustion engine
is, for the most part, switched off. Automatic
climate control continues to function. The elec-
tromechanically assisted steering gear allows
you to use the power steering without reduced
comfort. Acceleration Depending on the operating mode, pulling away
and driving under low load conditions are per-
formed: R
entirely by electric propulsion R
in combination with the internal combustion
engine
When accelerating rapidly under increased or
full load, increased boost mode is utilized. The
electric motor supports the combustion engine
by providing additional drive torque.
Overrun mode or braking There are three possible operating modes when
the hybrid vehicle is decelerating: R
energy recovery takes place even when the
vehicle is decelerating purely in overrun mode
( Y
page 20). The electric motor operates as a
generator and stores the recovered energy in
the high-voltage battery R
when the brakes are applied lightly, the vehi-
cle is slowed down further by the electric
motor. This increases the energy recovery
taking place ( Y
page 20). The electric motor
operates as a generator and stores the recov-
ered energy in the high-voltage battery R
during heavy braking, the service brake is also
used to slow down the vehicle. The two sys-
tems work together26
Driving tips
Driving and parking
Coolant temperature gauge
G WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The engine
will otherwise be damaged.
The multifunction display shows the coolant
temperature in the Coolant submenu.
Under normal operating conditions and with the
specified coolant level, the coolant temperature
may rise to 248 ‡ (120 †).
Multifunction display
C
Permanent display: outside temperature or
speed ( Y
page 44)
D
Time
Display messages
Possible causes/consequences and P Solutions
Withou t starting
engine again, con ‐
sul t workshop You canno t start th e engin e again due to a malfunction .
A warning tone also sounds.
If th e engin e is running:X
Visit a qualified specialist workshop .
If you switch off th e engine:X
Safeguar d th e vehicl e against rollin g away (see th e vehicl e Opera-
tor' s Manual). X
Notify a qualified specialist workshop or breakdown service.
á Towing Not Permit ‐
ted See Operator' s
Manual The hybrid drive system is malfunctioning .X
Hav e th e vehicl e transporte d on a transporte r or trailer to th e near-
est qualified specialist workshop .
