Can the dealer do that?

Hello, here’s what I’d like to do with an e90 330d lease. At the moment, I have an Audi A4, which he’s supposed to take into account. Now, however, there’s an amount of €250 to be paid off at the Audi Bank (normally until the next year – small installments) I could now pay off the amount and let me hand it over to the car letter, then he could take it into payment. However, I’m not quite as liquid at the moment and that would take a few months until I get the amount to a Does he have the possibility to transfer the remaining instalments to the Audi Bank and give them with the rest? Then I would have to wait net and he would have no financial disadvantage either. If someone says now then I should rather not lease 330d, I get more net in 2 months. Thank you