For Euro turn conversion I used the GM parking light method. Your car has two wires, one for the turn lamp and one for the parking lamp. The lamp in your EURO turn is the turn signal lamp only. You need to install a parking lamp in the housing. See this link for pix and instructions:
http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,268960/highlight,euro+turn+signals/
I bought GM parking lights for $2.95 each. I drilled 11/16" hole using a step drill bit in my cordless drill. The GM parking light snaps into the 11/16" hole. I used 194 bulbs (pack of 10 for $7.95). Crimp the black wire on the parking lamp to the parking wire (can't remember the color on the car maybe blue) on the car. The brown wire on the parking lamp is the ground, ground it to your light housing.
This is a simple project and the result looks clean and professional.
Good Luck