I wasn't aware before that you were hiding the car.
You can (a) negotiate a payoff with the lender or seek to reinstate the loan, and keep the car, (b) you can return the car, or (c) you can wait for the repo to be completed.
Note that hiding the car will cost you your right to reinstate the loan contract and get the vehicle back upon paying all past due amounts, late charges, and repossession costs and fees. (A relatively thorough repossession FAQ can be found
here.) It is conceivable that you could also end up facing charges for hiding collateral.