Enter Lines in Quotation Button Me47

Dear Experts ,

I am creating RFQ Based on General material Group "Cars for Ex" i need 2 Quantities , At time of Maintaining Quotation ME47 Vendor Send me Specification of the Cars , 1 Nissan Car , 1 Honda Car with certain Prices . The issue is system is display one line item for General Car , I need to separated into two different lines . I saw option of insert new line in ME47 but its not work . Could you guide me to achieve this ?