Nothing much, except for signing multiple papers. Everything was being filled by their end. There are also some filing charges, though I'm not sure how they calculated those and I didn't mind, as they handled all the paperwork.
I only had to go for 1 day and then, after few days I could see the loan account in my SBI netbanking. Maybe I had a little advantage because the car company had tie-up with them.
Note:
1. Make sure you go through all the papers, which they give you for sign although it's rare by SBI, but still prevention is better.
2. Take the photos of the documents as they will not give you anything. In my case, I had no document but I took all the pictures. Everything was with SBI, and once you finish your loan.
You will get a NOC along with a document (form 35) which you will need to submit to your RTO office for the removal of the hypothecation from the vehicle.