Multi-kilometres for leasing vehicle

Hello, the lease of my V 70 D 5, BJ 2002, expires at the beginning of 2006. Agreed were 180,000 km, until then I will have about 10,000 km more on the clock. The multi-kilometres are to be calculated according to the contract with approx. 2.2 Ct/km. According to the seller, Volvo generally admits a kulanz of 2,500 km. Currently I am in negotiation with the Frdl. over an XC 70 as successor. Another 2500 km the seller gives me, if I decide again for Volvo. The current state of the price negotiations lies with a discount on the list price of approx. 13%. Now my question to the connoisseurs of matter: Is this a good offer? If yes, even if I still have to pay approx. 700,– € because of the multi-kilometre of the departing wagon? Thank you for your information! beemer