I need to carry spare bulbs for driving around Europe.
On The 2006-on cars the front indicator bulb is a PY24W type. Spare bulbs are around £25/pair. They look like this:
(http://gallery.me.com/hahnenuk/102640/DSC00661/web.jpg)
So when I found a pair on eBay across the channel and they arrived for £10 including postage. I thought it would be rude not to. They also had a little extra!! :)
And they look like this:
(http://gallery.me.com/hahnenuk/102640/DSCF0865/web.jpg)
Apparently they are a standard BMW part. They aren't really necessary as the orange in the later 9-5 is well hidden. But I will fit them soon as they are also a bit brighter being the Vision Plus grade. :) Philips call them PY24W SV+.