OK this is the response I got from the wheel guy. I want to use the factory tires so which of the options he lists is what I need. Thanks.

We carry the VM9's in 18x8.5 +38, 18x9.5 +38, 19x8.5 +38, and 19x9.5 +38. Let me know which exact sizes you are interested in. As I'm sure you are aware, these wheels are made specifically for Mercedes-Benz fitment. Please verify that they will work on your vehicle prior to ordering. I know that the bolt pattern is the same. What I am concerned about it the center bore. Our wheels are drilled to 66.6mm. I'm not sure what the center bore is on your vehicle.

18's - $150 each
19's - $175 each

Shipping is $99 for the set of 4 wheels within the continental US.