Zhèjiā gōngsī shì Déguó qìchē de dújiā jìnkǒushāng.
This company is the exclusive importer of German cars.
Tips
usage
Paired with 出口商 (exporter). The suffix 商 turns an activity into the actor doing it: 进口 "import" + 商 "merchant" = "importer." Same pattern: 批发商 wholesaler, 经销商 dealer, 供应商 supplier.