WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
0492458 341120 Gauge MW
NOTE:
For checking the brake piston setting in the front fixed caliper, brake piston diameter 54...57 mm / single-circuit brake system [discontinued]