12-1050 Tool
WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
0491112 121050 Tool MW
NOTE:
(Tool) Shorter version for adjusting the dynamic ignition timing adjustment and carburettor synchronisation - Discontinuation from July 92 / automatic transmission [Discontinued]