R
the high-voltage battery is charged
sufficiently
R there are no malfunctions in the hybrid
system
i Yellow READY indicator :may still
appear in the multifunctio ndisplay, even if
all conditions for automatic engine switch-
off are met. Continue to maintain a speed
above 15 mph (20 km/h) until READY
indicator :turns green in the
multifunction display.
If all the conditions for automatic engine
switch-off have not been fulfilled, yellow
READY indicator :lights up. The internal
combustio nengine will not be switched off
automatically, if:
R the self-diagnosis functio nofthe engine
control unit is still active
R the temperature of the coolant or catalytic
converter is too low
R there is a malfunction in the hybrid system
R the climate control of the vehicle requires
it
R the high-voltage battery is being charged
(Y page 29)
R the vehicle has rolled back shortly
beforehand
R automatic emissions tests are running
Automatic engine start
The automatically switched-off internal
combustion engine starts automatically in
certain situations, if:
R you demand more power than the electric
motor can provide by depressing the
accelerator pedal
R the condition of charge of the high-voltage
battery has reached the lower limit
R the settings of the automatic climate
control require it, e.g. at high outside
temperatures above 86‡ (30 †) Overrun mode
The engine is switched off and disconnected
from the drive train. The electric motor
operates as a generator to produce the power
required for the auxiliary consumers and
charges the high-voltage battery.
Overrun mode is available in the speed range
below 90 mph (140 km/h).
Extended overrun mode
Overrun mode allows you to increase the
vehicle range.
When the vehicle is in overrun mode:
X
Pull the right-hand steering wheel paddle
shifter.
Recuperation is reduced so that only the
power supply for the auxiliary consumers
currently operating is covered. The high-
voltage battery is not being charged.
You can tell that recuperation is no longer
operating at full capacity by looking at the
power display for the electric motor
(Y page 28).
In this operating mode, the vehicle
decelerates less rapidly than a conventional
vehicle.
This function is deactivated again if:
R the engine starts up
R you depress the brake pedal
R you pull the left-hand steering wheel paddle
shifter Driving
23Driving and parking Z
