Well you don't give me much to go.. Wire colours and the like..
So at a guess you have three wire on both the mirror and the cars loom..
If you get a pen a pad plus pull out the trusty voltage meter you'll be able to source what's what, mind I think I have the car's info below
This is for both Left and Right
A B C Result
-ve +ve mirror in
+ve -ve mirror out
+ve -ve mirror up
-ve +ve mirror down
Right colour codes are;
A=Brown B=Yellow C=Light Blue
Left colour codes are;
A=Brown B=Violet C=Grey
As for the m3 style wires err I hope "they" supplied some information as all I can find out that the colour are red, white, black or blue, white, black.
I would only be guessing what the combination is. I can however suggest to only start with two cable's and see if you can find at least one correct combination for say mirror in, then work from there Don't panic there is only 27 different combinations so it shouldn't take to long to sort out but I can I suggest once you have found the combination post them