About Tyres: tread, size and damage each count separately: which statement is WRONG?

When measuring tread depth, you simply count the height of the wear indicators as tread.

Tyres on one axle must have the same size designation, except when an emergency or spare wheel is used.

Tyres may not show damage where the carcass is visible, independent of how much tread remains.

Driving a vehicle that causes or may cause danger on the road is prohibited at all times, not only on the day of the APK.

Explanation

trap: indicator-counts-too. The tread must be at least 1.6 mm, WITH THE EXCEPTION of wear indicators. Those therefore do not count in the measurement