Drayton Group has signed a remarketing deal with BCA for 2,000 vehicles annually.
Drayton holds franchises for Mercedes-Benz and Smart at eight sites across the Midlands.
The deal followed a tender process. Part-exchange vehicles from Drayton Group will be sold at BCA Birmingham every Monday, with every vehicle available to BCA Live Online buyers.
The Drayton sales programme launches on June 24 with an average selling price of around £7,000.
All non-retail part-exchange cars will be consigned to BCA for immediate remarketing.