PEUGEOT 508 Handbook page 238

In the event of a breakdown
Wheel with wheel trim
When refitting the wheel, refit the trim
starting by placing its notch facing the
valve and press around its edge with
the palm of your hand.
236
Access to the spare wheel
the spare wheel is located in the boot under
the floor.
Depending on the country of sale, the spare
wheel may be steel, alloy or of the "space-
saver" type.
Depending on your vehicle's equipment, the
spare wheel is restrained either by a strap or
a securing nut A and bolt B. For the nut, the
procedure is given below.
Taking out the wheel
F unscrew the (coloured) central nut.
F Raise the spare wheel towards you from
the rear.
F take the wheel out of the boot.