51 14... Instructions For Attaching Number/Letter Designation Combination: Removing

Coat nylon string or strong yarn with tensides (e.g. washing-up liquid).

Cut through adhesive layer and remove model designation (1) from rear lid (2).

Remove remainder of adhesive layer with adhesive remover (sourcing reference: BMW Parts Service).

Fig 1: Identifying Model Designation On Rear Lid

Courtesy of BMW OF NORTH AMERICA, INC.