BMW Z4 Roadster Owner's Handbook Manual page 124

CONTROLS
Displays in the instrument cluster
General
The display in the revolution
counter indicates that the Auto
Start Stop function is ready for
automatically starting the engine.
The display indicates that the pre‐
conditions for an automatic en‐
gine stop are not met.
Total time for switched-off engine
ECO PRO, see page 257, drive
mode: depending on the equip‐
ment, the total time during which
the engine is shut down by the
Auto Start Stop function is dis‐
played during an automatic engine stop.
After refuelling, the total time is automatically re‐
set.
Functional limitations
The engine is not shut down automatically in the
following situations:
▷ On steep downward gradients.
▷ Brake not pressed strongly enough.
▷ High outside temperature and operation of
the automatic air conditioning.
▷ Interior not heated or cooled to the desired
temperature.
▷ Where there is a risk of condensation when
the automatic air conditioning is switched on.
▷ Engine or other parts not at operating tem‐
perature.
▷ Engine cooling is required.
▷ Sharp steering angle or steering operation.
▷ Vehicle battery is heavily discharged.
▷ At high altitudes.
124
Driving
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Engine start
Operating requirements
Steptronic transmission
For driving off, the engine automatically starts
under the following conditions:
▷
▷
Driving off
After starting the engine, accelerate as normal.
Safety function
After an automatic shut down, the engine will not
restart automatically, if one of the following con‐
ditions is met:
▷
▷
Several indicator lamps illuminate for various
lengths of time.
The engine can only be started using the start/
stop button.
System limits
Even if you do not want to drive off, the engine
restarts automatically in the following situations:
▷
▷
Online Edition for Part no. xxx - X/18
Bonnet is unlocked.
Park Assistant is activated.
Stop-and-go traffic.
Steptronic transmission: selector lever posi‐
tion in N or R.
After reversing.
Use of fuel with high ethanol content.
By releasing the brake pedal.
With Automatic Hold activated: press the ac‐
celerator pedal.
Driver's seat belt unbuckled and driver's door
open.
Bonnet has been unlocked.
Very high temperature in the interior when
the cooling function is switched on.
Very low temperature in the interior when the
heating is switched on.