Mercedes truck
http://imcdb.org/vehicle.php?id=666672

this can be listed as another FWD unknown
http://imcdb.org/vehicle_375334.html

the cabin segment looks close enough IMO for a Bavaria unknown designation
http://imcdb.org/vehicle_506044.html

such an obscure company (even in Germany) you find almost nothing on WWW

Fergie unknown
http://imcdb.org/vehicle_630887.html

isn't this too dark ?
http://imcdb.org/vehicle_590634.html

this was solved, the American LaFrance badge visible up front
http://imcdb.org/vehicle_669609.html

and this http://imcdb.org/vehicle_668289.html

I suggest main pic change you don't have the sand obstructing
http://imcdb.org/vehicle_668408-Allis-Chalmers-TL-Series.html

These RVs are solved:
http://www.imcdb.org/vehicle.php?id=592787
http://www.imcdb.org/vehicle.php?id=623915
http://www.imcdb.org/vehicle.php?id=640829

Figured out some more details about this one:
http://www.imcdb.org/vehicle.php?id=540752

http://imcdb.org/vehicle.php?id=238719
http://imcdb.org/vehicle.php?id=472926 (compact articulated loader, so perhaps construction cat)

http://imcdb.org/vehicle.php?id=499707
http://imcdb.org/vehicle.php?id=569210

Lamborghini unknown
http://imcdb.org/vehicle_669784.html

Brabham BT10
http://imcdb.org/vehicle_224749.html

this was busted but same problem Hy-Mac or Hymac 480
http://imcdb.org/vehicle_75189.html

and this was solved , I checked and it fits , also perhaps should be moved to tracked vehicles since its just a crawler tractor
http://imcdb.org/vehicle.php?id=435060

Marshall unknown model origin UK
http://imcdb.org/vehicle_71691.html

Komatsu unknown
http://imcdb.org/vehicle_603062.html