Wow, that is dedication, a 6.5 year old thread revival for completeness.
I'd advise you save the last linked image elsewhere as it won't be there 90 days after the ebay item ends.
I did the whole removal of the grille thing on my way euro rhd e34, once you know where the tabs are its a very quick job. You will need a long e.g. 10 inch flathead screwdriver to get at the one coming from the top, the others were fairly easy. The reason I did it was to find why the vert aim motor was turning nonstop as soon as parkers/headlights were turned on, the plastic housing had cracked. Interestingly after I disconnected both motors (aimed manually using the screw) I got no more dodgy coolant, oil level, lic plate light etc warnings since.