Mercedes and parts ,I doubt they are cheap and easy to install many of them.
A little story here about having a nice OLD Ford Aerostar van and traveling.
The Aerostar is out transfer vehicle to go from FL to OH and back, usually at least 3 times per year. It has tools in it for general repairs.
I was returnin g from Cincy after greeting our latest grandson, 2 days old, and about Williamsburg,OH the van developed a shake like loose lug bolts or bad wheel bearing and pulling left when braking.
I made it on a side road to Mt.Orab and there was an AutoZone and an Advance Auto right handy.
I checked the front wheels and the right one was hot. Went into Advance and asked about parking in their shade (for my wife's comfort) while I jacked the right front wheel up. They said fine just don't have it on the lot after closing.
Didn't have to hold the brake to loosen any lug nuts...………….wheel was locked up.
Got a 27 dollar brake caliper,so easy to install it's laughable, and went on my merry way.
Somehow, I doubt the Mercedes would've had a 27 dollar part and that easy to in stall. Could be wrong though. LOL!