The Bmw E34 is a very nice looking car. But it is always interesting to distinguish Your E34. You can purchase all the parts from circlebmw.com or pacificbmw.com.

2x Euro headlights: (Thanks Stewart Ebrat & E30M3TheRealM3)
LOW BEAMS: (Need Two H1 Bulbs)
Low Beam Caps: 63-12-1-378-333, 2 needed- ($18.50/ each)
Yellow Connector Terminal Plugs: 61-13-1-378-419, 2 needed- ($1.45/ each)
Wiring Cables: 61-13-0-007-445, 4 needed- ($3.00/ each)

HIGH BEAMS: (Need Two H1 Bulbs)
High Beam Caps: 63-12-1-378-367, 2 needed- ($18.50/ each)
White Terminal Plug Connectors: 61-13-1-378-417, 2 needed- ($1.45/ each)
Wiring Cables: 61-13-0-007-445, 4 needed- ($3.00/ each)

CITY LIGHT SOCKETS: (AKA "E.T. Fingers" :)
City Light Socket Housing: 63-12-1-378-334, 2 needed- ($9.90/ each)
Grey Terminal Plug Connector: 61-13-1-378-402, 2 needed- ($1.45/ each)
Wiring Cables 61-13-0-007-441, 4 needed- ($3.00/ each)

You can also pick up a roll of heat shrink wrap from Home Depot ($8.75) to cover over the butt splices, assorted blue tap splices (for the city lights) & blue butt splices- #16-14 AWG ($3.00). Protecting the wiring I picked up some "Spiral Wrap" from Wal-Mart ($1.99), to go over the factory light harness-

Clear front indicators:
Left: 82 19 9 404 275
Right: 82 19 9 404 276
Clear front indicator bulbs:
Use high temperature silver paint (barbecue paint) on the orange bulbs.

Clear tail light:
Left: 82 19 9 404 278
Right: 82 19 9 404 281

Clear side indicators:
Left: 82 19 9 404 387
Right: 82 19 9 404 388

European spec. bumper trim (removing the marker lights):
Front1: 51 11 1 944 177
Front2: 51 11 1 944 178
Rear1: 51 12 1 944 185
Rear2: 51 12 1 944 186

Wing:
Rear Deck Spoiler: 51 71 2 231 669

Bodykits: the Mtech bodykit is the nicest and cleanest for the E34.
M5 Aerodynamic: Kit 51 71 9 061 649

Thanks to Hans L., Steph and Matt M., Rob & Chris B