R
copper: driving at con stant speed or with
mode rate acceleration
R blue: recuperation (cha rging the high-voltage
battery) or overrun mode Re
generative brake sy stem Fu
nction of there ge nerative brake sy stem
Depending on the selected recuperation le vel,
th e electric mo tor is operated as an alternator
when in overru n mode and du ring braking in
order tocharge the high-voltage battery while
driving. As soon as youre lease the accelera tor
pedal when theve hicle is in motion, recupera‐
tion in overru n mode is initia ted.
The rege nerati vebrake sy stem has thefo llowing
ch aracteristics:
R suppo rts braking with an electronically con‐
trolled brake forc e boosting
R con verts th e kinetic energy of theve hicle
into electric energy
In the drive program, you can use thesteering
wheel gearshift paddles tomanually adju st theintensity of
recuperation in overru n mode
(/ page 161).
Sy stem limits
The braking ef fect of the electric mo tor during
re cuperation in overru n mode may be reduced or
may not be available at all in thefo llowing situa‐
tions:
R when the high-voltage battery charge level
inc reases
R ifth e high-voltage battery is not yet at a nor‐
mal operating temp erature
R when driving at speeds close tozero
R in transmission position i
R during and af ter ESP ®
inter venes
In these cases, the desired deceleration is set by
th e brake control sy stem. Also brake with the
service brake if necessar y.
Manually setting recuperative deceleration
Yo u can use thesteering wheel gearshift paddles
to manually adju stthe intensity of recuperation
in ove rrun mode. The higher
there cuperation, the more sharply
th eve hicle is braked when coasting and the
more electrical energy is fed into the high-volt‐
age batter y.
% The standard setting is automatically set
af te r a restart of the engine or af terre-
engaging transmission position h. #
Toincrease recuperation: briefly pull gear‐
shift paddle 1. #
Toreduce recuperation: briefly pull gear‐
shift paddle 2. #
Select hÃ: pull and hold gearshift pad‐
dle 1or2. Driving and parking
161
