Thank you very much for posting this. I might need to do this as well since we are not allowed to have the orange ones constantly on here in EU and I imported a US Spec M3. I will find out tomorrow after I have been to the local DMV.
It would be greatly appreciated if someone could provide answers to the following.
Has anybody tried this on an M3?
I see two problems with this mod on an M3. Firstly there is alot of stuff to be removed in order to access the driver side harness. 2nd does the M3 side marker/blinker have the same wiring as the 335 or 328. If so I see no problems unless I am missing something.
Thanks in advance