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I'm no expert, but I'll give it a shot.
Your best bet is to either wait until SOL expires or have the $$$ to PIF. Once you are in that position, then DV the CA and offer a PFD for the full balance or a proposed settlement. If they accept, pay it and they will delete. Don't pay in installments. And don't talk to them (never ever call a CA) and don't write them until your SOL expires. Last thing you'd want is a judgment.
Most CAs update monthly.
Now you may want to research your state laws on repos. Seems like some states place requirements on the lender to sell a car after X amount of time. If that is the case, you'd need proof that they received the car three month prior to the auction.