PEUGEOT 508 Handbook page 234

In the event of a breakdown
F Switch on the compressor by moving
the switch B to position "I" until the tyre
pressure reaches 2.0 bars.
the sealant is injected into the tyre under
pressure; do not disconnect the pipe from
the valve during this operation (risk of
splashing).
If after around 5 to 7 minutes the
pressure is not attained, this indicates
that the tyre is not repairable; contact
a PeugeOt dealer or a qualified
workshop for assistance.
232
F Remove the kit and screw the cap back on
the white pipe.
take care to avoid staining your vehicle
with traces of fluid. Keep the kit to hand.
F Drive immediately for approximately
three miles (five kilometres), at reduced
speed (between 15 and 35 mph (20 and
60 km/h)), to plug the puncture.
F Stop to check the repair and the tyre
pressure using the kit.
Tyre under-inflation detection
If the vehicle is fitted with tyre under-
inflation detection, the under-inflation
warning lamp will remain on after the
wheel has been repaired until the
system is reinitialised by a PeugeOt
dealer or a qualified workshop.