PEUGEOT 508 Handbook page 173

Emergency braking
In the event of a failure of the main service brake, a
continuous pull on the control lever A will stop the
vehicle.
the dynamic stability control provides stability
during emergency braking.
If the emergency braking malfunctions, the message
"Parking brake control faulty" will be displayed.
If a failure of the DSC system is
signalled by the lighting of this
warning lamp, then braking stability is
not guaranteed.
In this event, stability must be assured by the
driver by repeating alternate "pull-release"
actions on the control lever A.
the emergency braking must only be
used in exceptional circumstances.
In the event of a battery failure, the
parking brake can no longer be
operated.
As a safety measure, if the parking
brake is not applied, immobilise the
vehicle by engaging a gear or by
placing a chock against one of the
wheels.
Contact a PeugeOt dealer or a
qualified workshop.
Driving
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