My car was hit slightly by on the front right side. As I can see the damages includes scratches on the fender and the wheel. I don't think it's significant. he body shop (claimed to be local MB dealership certified, had good experience with them previously) I got a quote from said they would work on the bumper/grille/fender/pillar/rocker/floor/door, and they would check alignment and realign the wheels if needed, by a third party mechanic shop. Can I use them, or I should go through the dealership to avoid any warranty problems in the future?

Dealerships typically don't do body work/repair. They will refer you to one of their reputable local repair facilities, that they use, to have repairs done (lot damage, acquisition reconditioning, etc.).

A dealership is not your answer.

As said above, dealerships typically don't do body shop work. That's a different kind of business. You are definitely best off by using a Mercedes certified body shop to ensure the repair is done with genuine parts and in accordance with factory procedures, but you can just use the locator on mbusa.com. This will also tell you if the shop you've already been talking to is indeed certified.

https://www.mbusa.com/en/certified-c...-repair-center

Thank you. I understand the delerships use body shops for body work. I was just a bit concerned about the wheels as I don't know which mechanic shop they were going to use. The one I picked appears in mbusa certified list, seems I can just go and get it done.

An alignment isn’t rocket science technically. Tire shops do it all the time. That said, I’ve had bad experiences with shops used by body shops for alignments and had to get it aligned again at a shop of my choosing that knows what they are doing.

Wheel repairs is also something that body shops don’t do. There are specialized shops for that. I’ve never had good luck with wheel repairs, though. Just doesn’t come out like factory condition and I’ve ended up replacing the wheels in the past.

Ask for what brand of paint they spray. Try to be sure they spray Glasruit to get a better color match.