Another thing to keep in mind is to read the set of documents that they want you to sign. Some of the pages are just bull**** and you should refuse to sign them. Also take copies of the pages you signed.
In my case the guy came with a set of docs on which he wanted my sign. Some of them being absurd and not relevant, I refused to sign them. He was like, "Sir, these are standard documents and everyone has to sign them. There is no way our bank is going to give the loan without you signing all the pages." I said, if so I would go to another bank. Then he had me talk to his manager, who tried to feed me some financial jargon and stuff. Asked him to hold it and made it clear that irrelevant pages will not be signed. Finally they accepted and I struck out the irrelevant pages.
One of the declarations that they wanted me to sign was "Even if all the EMI cheques were honoured, they still retain the right to seize my car". What can be more absurd ? I pay them and still have to agree to let them seize my car.
Be aware that the competition is hot in the auto financing industry and the consumer is king, if he knows how to act like a king.