My 08 E90 and 11 E90 had a waxy yellow grease on it too. My 2012 335is FOB does not have any of the grease nor smells bad, it is squeaky clean. weird....
2008 335xi E90 Alpine White - Sold - 8/19/10
> 2011 335xi E90 Jet Black - Sold - 6/27/12 > 2012 335IS E92 Crimson Red - SOLD 3/15/15 > 2015 M4 Yas Marina Blue Current