Mazda mx5 Owner's Manual page 512

If Trouble Arises
When Boot Lid Cannot be Opened
6. Pull out the cap and open the boot lid.
After performing this emergency
measure, have the vehicle inspected at
an expert repairer, we recommend an
Authorised Mazda Repairer as soon as
possible.
CAUTION
Do not pull the screw when pulling the
cap. Otherwise, the screw may fall off
and become lost.
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