My dealer's limit was $1k. I tried to pay for my $2k desposit with a CC at the closing, and the merchant balked ("do you have a checkbook, debit card, etc?"). My response was this limit wasn't on the front door, the salesman never mentioned this during 3 weeks of closing the deal, and I could just as easily walk away, as I hadn't signed anything. They had to go "visit the sales manager"... next office... and he approved it. I figured the $60 in merchant fess was worth it to them, to close. Also, I was leasing a unique vehicle combo, the next choice was over 400 miles away ("take this one, or enjoy the flight"), so I figure I didn't strike the absolute best deal, so they had the room.

Steve B.