I stand to be corrected, but the meaning here is "produs si asamblat pe scara larga"

"in volume" este aici sinonim cu "bulk"

am gasit aceasta referinta, s-ar putea sa fie un document foarte asemanator cu cel pe care il traduci, si unde se explica faptul ca masina trebuie sa corespunda unor standarde si unui model stabilit pentru intreaga productie in serie:

http://www.gvh.hu/domain2/files/modules/module25/pdf/19_2004...

pagina 9 punctul "o"

o) a „motor vehicle which corresponds to a model within the contract range”
means a vehicle which is the subject of a distribution agreement with another
undertaking within the distribution system set up by the manufacturer or with
his consent and which is identical as to body style, drive-line, chassis, and type
of motor to a vehicle within the contract range and which is manufactured or
assembled in volume by the manufacturer;

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Note added at 3 hrs (2009-06-27 23:11:53 GMT)
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chiar si produs in serie, cred ca merge aici foarte bine

Succes Misu!