To be honest, I don't remember exactly where I found it, and I'm replying via my phone. I'd start by looking on e38.org, then if no luck there, then try using Google.
When I did it I remember a few sites I found. One had me disassemble the lock and check to make sure the spring mechanism was intact, the other had me doing something like turning the trunk key while connecting the battery or something. Sorry I can't give you more at the moment.
New here? Please visit www.e38.org, THEN you ask questions
325hp 98 740iL, black/black
- Eatin 540's & $hittin 318's
M5 6spd conv., Iron sleeves, L/W Teflon coated pistons, 3 angle valvejob, P&P head, cams, electric fan, CF intake tube w/aluminum heatshield, Magnaflow 14816'd
INTERIOR:Hardwired V1 above rearview, 12" RE Audio DVC sub, MTX 81000D, silver trim, 5% tint
EXTERIOR:19" Beyern Mesh staggered, Shadowline kidneys, Axxis pads
01 X5 4.4 - F90BT, L5