I personally wouldn't go to Mercedes for anything except battery certification. (free) once a year. I do my wiper blades, cabin air filter, and tires myself.
The car needs "Mercedes" summer fit/winter fit windshield washer fluids --
other colors throw off the sensor (Makes the car think the washer fluid is empty)
So I buy Mercedes "Summer Fit" / "Winter-Fit" concentrate on Amazon/eBay -- mix as instructed with water.
Cabin air filter takes 2 minutes, no tools needed -- email me for pictures. (Buy on Amazon or eBay)
WIX - Cabin Air Filter
Part # WP10130
Line: WIX
It is under dash on passenger side.
Front Wiper Blades are Bosch : (AMAZON)
Wiper Blades:
Driver’s Side 26" (650mm) Bosch 26OE
Passenger Side 19” (475-480mm) Bosch 19OE
Rear wiper blade is hard to find, I use eBay:
Correct REAR Wiper:
* Item Name: Twin Rear Windshield Wiper Blade
* Part Brand: BOSCH
* OEM Numbers: 246 820 10 45 / A 246 820 10 45
* Length [mm]: 270
* Important: 270mm / 11"
From eBay:
http://www.ebay.com/itm/171538465015?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
New Interchange Part Number: W246
Part Brand: H261 3 397 011 676 Brand: BOSCH
Warranty: Yes Manufacturer Part Number: 2468201045 A2468201045 3397011676 H261 B-Class
You can reset "Service A" in the dashboard yourself using this instructional video:
Mercedes Service Indicator Reset
https://www.youtube.com/watch?v=2bLjAhIamyc
Turn key on to READY, then back to position 1
Go to odometer screen, reset trip odometer
Make sure you press and hold the answer call button first -- and within 1 second, hold the OK button.
Secret Menu Assyst Plus Click OK
Full Service Click OK
Confirm Service Click OK
CONFIRM