CITROEN C-ZERO Handbook page 52

Safety
Excessive wheel slippage may damage
the differential of your vehicle.
Reactivation
These systems are not reactivated
automatically.
F Press the button again to reactivate them
manually.
The symbol going off in the instrument panel
indicates reactivation of the ASR and DSC
systems.
Operating fault
Illumination of these warning lamps
in the instrument panel indicates
malfunction of these systems.
Contact a CITROËN dealer or a qualified
workshop to have the ASR/DSC systems
checked.
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Although the ASR/DSC systems help
improve safety in normal driving, they
should not encourage the driver to take
extra risks or drive at high speed.
The risk of loss of traction increases in
conditions of reduced grip (rain, snow,
ice). For your safety, you should therefore
keep these systems activated at all times,
particularly in poor conditions.
The correct operation of these systems
depends on observing the manufacturer's
recommendations regarding wheels (tyres
and rims), braking system components
and electronic components, as well as
assembly and repair procedures used by
the CITROËN dealer network.
After an impact, have these systems
checked by a CITROËN dealer or a
qualified workshop.
https://www.automotive-manuals.net/
Engine brake reduction
indicator lamp
Your vehicle is equipped with a system for the
recovery of energy during deceleration which
uses the engine brake.
It recovers into the traction battery some of the
energy generated when the vehicle slows down
(e.g. on a long descent) to improve the range
of the battery and so the distance that can be
travelled between charges.
When the traction battery has been charged
fully and for the first few miles (or kilometres) of
use of the vehicle, the engine brake is reduced
temporarily.
This indicator lamp flashes on the
instrument panel, inviting you to
adapt your driving accordingly.
We therefore recommend that you anticipate
your braking as much as possible: use the
brake pedal to slow down or stop the vehicle.