Selling RV, urgent help needed on proper process California

I recently sold my DP MH on RV Trader. You need to make sure that you immediately, by computer, fill out a release of liability form on the DMV website. You possibly will have to do a smog test before reregistering it. I just found out that diesel propelled vehicles now have to have a smog test upon sale. I have no idea where that is done at. If I were you, I would go to DMV with the new owner to ensure immediate xfer. If not, that release of liability is very important. hope it helps
Lee