I can confirm that is an oil dipstick. Here is my post from October where I found it by accident. The 645Ci guys have the traditional large red ring on the end of the stick.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater
Last edited by Yorgi; 12-20-2012 at 06:49 PM.