Fiat 500L 2013 Owner's Handbook Manual page 339

RIM PROTECTOR TYRES
DO NOT fit wheel caps when using
integral wheel caps fixed (with springs)
to the steel rim and after sale tyres provided
with Rim Protector (fig. 46). Use of unsuitable
tyres and wheel caps may cause sudden loss of
tyre pressure.
fig. 46
WARNING
F0Y0005
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