White worm in alloys

[Mercamd]

Another Mercedss problem that is common across the last 6 years, whitewood within the diamond cut 18" AMG alloys.
Normally appears around the centre badge. Covered under warranty jf picked up soon enough.

 

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[markjay]

I very much suspect that this is caused by careless tyre fitters who try and prise-off the caps using a screwdriver (slightly damaging the alloy wheel and allowing moisture and corrosion to set under the paint) instead of gently pushing it out from the inside with a screw driver butt once the wheel is off the car.

 

[optimusprime]

Mercamd it is looking like a strip and repaint for you . Weather, and the damp, get in to the alloy, and then the white worm or spider is born But an easy fix .