Used to own a Mercedes GL320 and I still have the following (not sure if it works on other models):

Roof Rack Basic Carrier (2 bars) $200.00
3x Bicycle Rack $120.00 each (320 for all 3)
1x Ski/SnowBoard Rack $200.00

Or buy it all for $700

Currently located in Montesano WA, near Olympia but within often in Seattle and Portland. This rack is hardly used and like new - it's been stored in a dry, heated garage. If you aren't local, shipping costs will apply.

 

I would buy the cross bars if you still have them. please email me at dbaalek at gmail.