altimabk said:
I have just finished installing ML 320 side markers today. It is not hard, but very time consuming if you want to do it right.
To answer your question... Yes! not only top and bottom sides have to be filed to fit in, but also both sides.
Things you might want to consider - file top and bot. sides of the side marker till nothing is sticking out - on the side marker tab that clicks in the fender, file away only the plastic ridge in the middle of the tab that sticks out. - side to side fender opening measurment has to be exact to have the side marker secure tighty into the fender opening, using a vernear caliper, I have measured side to side opening demension to a 87.50 mm or 4.16 mm filed in on the tab side. file and try pushing in the side marker. repeat till you hear clicking sound when you push in the side marker. you should only be able to push out side marker from inside the fender when you hold the tab in. - use touch-up paint on filed areas.
way too much involved.
Take sidemakers, remove orange piece.
File sides with a file or dremmel, just on the gray piece, not the lense itself.
File top and bottom in same manner.
How much to file? Trial and error, file a little, try to fit it in.....file a little, see if it fits.....until it fits.
Make a little notch so the existing wiring will fit.
Stick stock wiring into sidemaker, push sidemarker in nice and tight.
Go drink a beer
No filing fenders. No measuring. 30-40 minutes tops