Here is a Mercedes Gwagen roof rack that I bought from VTP.no It is a NOS rack from the Norwegian Army that was used over the single cab portion of their box ambulance (shown in the 4th picture). It allows the spare wheel to be lowered to the side of the car from the roof for easy loading and unloading. It fits all G-class from 240GD to G63 and G550 4x4 squared
I have taken this to Baja, Moab, Death Valley on the craziest trails and it is solid as can be with full length gutter clamps. I had it on my G500 1999 and 2002. Leaves plenty of room for the sun roof or 3/4 rack for a folding roof tent.
It is in like new condition. It holds a spare 33.4" tire no problem with room to spare. Also 2 locking gas can holders are mounted to the rack which makes the Norwegian version of this rack so much better than the typical German version which only has the tire slide.
I am loath to sell so price is firm at $1100
You will not likely see another one for sale in the US