Fitting 3rd row seats
 

Just bought family pack seats on Ebay, can anybody tell me where i can get info on fitting the 6th and 7th seat into my ML270 Estate. Has fittings in boot, but no seat belts. Can anyone tell me what seat belts i will need to get/order for the two fold up seats, they have the seatbelt slot in connection on the seats; just no seat belts.

Thanks in advance