We have released Single Dealer version 1.7.18 for Joomla 1.7!
The next functionality has been added to this version:

• Added ACL to Vehicle management (Preferences)
• Added ACL levels to makes and models manager, managers cannot reset the current database anymore when uploading CSV files.
• Configuration can only be changed by Administrator or higher
• Configuration for deleting vehicles, are managers allowed to delete or only (un)publish.
• PDF Creator on the fly (one-click), note you do need an account for this function.
  Register: https://pdfcrowd.com/
  You can now create a PDf file of the vehicle like Joomla does, but this one accepts CSS3 and images like we wanted. 100 Credits for free. (For more credits, take a look at the pricing plan)
• Added support to show sold vehicles. You have now an extra option: Available, Unavailable, Coming Soon, Option taken and Sold (as new entry)
  The settings can be defined per category and or full stock page. (See basic parameters during the while adding a menu item)
• Added 8 options as requested; Premium Sound, Privacy Glass, running Boards, Moon Roof, Premium Wheels, Keyless Entry, Roof Rack, Tow Package.
• Improved the search pages, now you can also search for specific options in the database. EG; MP3 player, DVD Players and so on. All values will be held to new search has been entered.

If you have any questions, or find some issues. 
Just let me know!