Mercedes-Benz SLK-CLASS Operator's Manual page 155

!
Wheel bolts 2 must be used when
mounting the spare wheel with
collapsible tire. The use of any wheel
bolts other than wheel bolts 2 for the
spare wheel with collapsible tire will
physically damage the vehicle's
brakes.
Warning!
Make sure to use the original length wheel
bolts when remounting the original wheel
after it has been repaired.
G
Practical hints
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