I'm at 30,000 miles with my original Conti Contacts and in need of replacement. No need for all season tires here in Florida.
The local Costco lists only Michelin Diamaris, exact size as original,for $300/wheel, including mounting/balancing.
The advantage I see from Costco is they give lifetime balancing/rotation/flat repair and nitrogen inflation for these tires.

Any comments regarding Costco or these tires? Thanks...

 

Tire Rack has them for $286 (excluding shipping charges), so that seems like a decent price. You can read customer reviews here.

 

Search this forum for tires and you'll learn more about the 4 options available in 19".

here's a link:

https://mbworld.org/forums/gl-class-...oes-x-2-a.html

 

I have the 19" Pirelli Scorpions on my GL320. I was caught in a blizzard in NW Nebraska in November on my hunting trip. I was amazed at the traction of the vehicle and the Scorpions in the snow. I had to bust through drifts up to hood height, and go through long unplowed sections of road drifted full of up to 18" of snow to get to the airport. The truck performed very well, I never felt like I was going to get stuck. I even had to pull couple of vehicles out of snowdrifts. I would still like to have a true all-terrain tire in the 19" size, and I only have 14,000 on the vehicle now, so I don't know how they will last, but if there are only the current 4 choices, I will go back with the Pirelli's.