Fleets can keep track of the bidding, with the screen adjusting each time an offer is made on a vehicle.
Fleet managers do not have to set a reserve and each bid is seen as provisional until Cars Direct confirms the deal.
The site has been in operation for six weeks and auctions take place twice a week on a Tuesday and Thursday, although bids can be taken throughout the week.
It is open to both trade and private bidders.
Trade buyers and other possible bidders are being targeted with a direct mail campaign.
Graham Johnstone, group chairman at Cars Direct, said: 'Internet access enables us to compete with major groups. Prices range from £1 to £100 for a full pack including collection of the vehicle and refurbishment.'
All vehicles featured on the site include a full description and photographs. Buyers are also able to obtain a quote for refurbishment and transport costs. The site doesn't just cover auction vehicles as there is a fixed price stock locator showing a selection of vehicles which have been refurbished and have a forecourt price.
Johnstone said: 'The fixed price locator enables smaller outlets to advertise a vehicle to potential customers without actually buying it.'
Cars Direct is working in conjunction with Perfectacar, which refurbishes the vehicles.