2nd Row Carseat Capacity
 

I currently drive an ML and I am interested in getting either a GL or an R class. I prefer the styling of the GL but I am concerned about carseat capacity. I have 2 kids and we are planning to have a third (all of which would be in carseats). Does anyone know if 3 carseats will fit in the 2nd row? I understand the 3rd row can be difficult to access in the GL so climbing into the back might be a problem with carseats in the 2nd row. My ML will only fit 2 carseats with just a little room between them. Any help would be appreciated... Thanks!