Still the same currently for Benz. Occasionally they have repair kits, but more often it’s a whole assembly or nothing.
Class example, the newer wiper arms have a plastic sliding lock on their ends to secure the wiper blade, if the plastic slider fails, falls off, you buy a new whole arm which comes with the lock- only way to get it.
Prices can be sky high - recently quoted 4 stock rims and tires on a 2023 S Class that the Customer had bought used , it had oversized aftermarket rims on it. Which were rubbing on the upright spindles of the front suspension due to the width and offset being wrong for the vehicle. Someone had even ground off some metal from tge spindles to help clear the inner bead of the rims .
Only two hours labor for the quote, but parts and labor came to a quote of almost $12000.
Yes, 12 grand. Needless to say, the Customer declined.