Yeah speed rating isn't really the issue, i'm just on about the vehicle manufacturer identification on the sidewall.

However, having looked here - http://www.motuk.co.uk/manual_410.htm - "f. a tyre not fitted in compliance with the manufacturers sidewall instruction e.g. an asymmetric with a sidewall marked ‘outer’ fitted with the marking to the inner side of the wheel.

Note: Direction of rotation may be indicated by an arrow and/or words, but an arrow by itself should not be taken to indicate direction of rotation"

Could you then say a tyre marked MO on an audi is now "a tyre not fitted in compliance with the manufacturers sidewall instruction " thus a failure?