I JUST ORDERED THE WHEEL LOCKS, REAR CARGO NETS, CARGO COVER AND MUD FLAPS (FRONT AND REAR). THIS COMPANY HAS EXCELLENT PRICES.
http://mercedes.dealerfit.com/store/...at909_2478.php

 

just an observation, they have the US 20's and say they are 20x9.5 with a 57 offset. way wrong.

 

+1

From their site under 20 inch rims:

Finish: sterling silver Wheel Specs: 7.5 J x 19 ET 47 Front, 9.5 J x 20 ET 57 Rear Recommended Tire Size: 235/45 R20

HUH? I think just a typo as other wheels seem to have correct specs. I think 9.5 X 20 size relates to European rear wheels, as in Europe they have staggered sets for GLK.

 

Thanks for the linnk...BP

 

As an option we could have purchased the wider rear wheels from the dealership as well. They are the 20x9.5 width and cost $930 each and the recommended tire size is 255/40/20