You will be starting as a freshie.
1) Play DayZ as it was meant to be played - starting from scratch.
2) Make your way to the parking meter where you parked your vehicle.
3) Retrieve your vehicle from the garage ONLY if you did not save your RAG kits in it. If your vehicle does have RAG kits in it you must wait until the RAG mods have been re-installed. If you retrieve the vehicle before that any RAG items inside will be permanently deleted.

After the RAG mods are re-installed:
** Check the website for the announcement that RAG mods have been re-installed **
1) Retrieve your vehicle which will contain everything you stored inside it - including the RAG kits.