If your car has disappeared from the World Market in Car Parking Multiplayer, follow these steps to troubleshoot and potentially resolve the issue:

1. Change Your Session: Sometimes, issues may arise due to network or session problems. Exit the game completely, then restart it. Ensure that your internet connection is stable during this process.

2. Check for Updates: Ensure that you are using the latest version of Car Parking Multiplayer. Developers often release updates that fix bugs and issues related to the game. Visit the app store on your iPhone and check for any updates.

3. Visit the World Sale Again: After restarting the game, navigate back to the World Sale section to see if your car reappears. Occasionally, cars may be momentarily unavailable due to server-related issues.

4. Review Your Listings: If you manually put your car up for sale, check your active listings in the World Sale. Sometimes, users may overlook that their car is still in the listing but not showing visually.

5. Forum and Community Advice: Engage with the community on platforms such as Reddit where other players share similar experiences. You may find specific insights about the disappearance of cars in the World Sale that could help you. For example, some users have reported cars disappearing shortly after they were listed - learn more.

6. Check For Rejection Reasons: Sometimes, cars may be rejected for sale due to specific reasons outlined by the game. It's useful to check community discussions regarding why cars might not be eligible for the World Sale or may disappear learn more.

7. Watch Fixing Guides: If the issue persists, consider watching instructional videos that guide players on fixing such problems in Car Parking Multiplayer. Various content creators provide solutions tailored to the game's current state - learn more.

8. Contact Support: If none of the above steps work, consider reaching out to the game's support team. They can provide assistance regarding your specific issue and help recover your vehicle if it was indeed lost due to a technical glitch.

9. Stay Informed: To avoid future issues with your vehicles in the game, keep up with community updates and developer notices regarding the World Market, as changes to gameplay mechanics can impact how cars are listed and sold.

By following these steps, you should be able to determine the cause of your car's disappearance and hopefully recover it in Car Parking Multiplayer. If it seems like a widespread issue, community forums will likely have ongoing discussions regarding it, helping you stay informed.