51 31 ... Instructions for repairing stone-chipped laminated safety glass windscreens (clear and tinted) : General:

WARNING: This page is about a different car, the 2003 BMW Z8. However, it is still accessible from the selected car via links, so may be relevant.

These instructions are restricted to the repair materials approved by the plant (DUOBOND) (sourcing reference: BMW Parts Service), the repair method and related tips to simplify the work involved.
The instructions can only outline the general work procedure.
The actual scope of work must be adapted to suit the extent of damage.
The repair work represents an economical and swift solution which cannot rule out visual impairment.
The repair should be offered to the customer on passing through or for used vehicles and on special customer request.
The conditions detailed below for repairing laminated safety glass windscreens conform to the legal requirements in Germany.
In other countries, the relevant requirements must be observed.

IMPORTANT:

Repair work may only be carried out outside the field of long-distance vision.
Only damage to the outer surface of the windscreen may be repaired.
The inner window pane and the plastic film between inner and outer window panes must not be damaged.
Repairing should be carried out as soon as possible after occurrence of the damage.
The penetration of moisture or dirt must not be visible in the damaged spot.
Impact spot cavities must not exceed a diameter of 5 mm.
Cracks leading away from the impact spot must not be longer than 50 mm.
Cracks must not end in the rubber window frame or decorative strip.
Visibility through the repaired surface must be clear, transparent and with minimum distortion.
Cover engine hood and front side walls with protective covers.
Note processing instructions!