[AGS]

I'll provide an observation for the opposite just for discussion purposes. Maybe you consider pulling the trigger prior to the end of the lease. Here's why:

1. I'm assuming by "upside down" in a lease you mean that you're running over on the miles. No matter what you will need to make the remaining lease payments, but by trading in early you avoid the extra charges for the excess milage.

2. The downside to turning the car in early is time value of money - you're making all the lease payments immediately instead of over time. However if your dealer will roll the remaining lease payments into the new financing, then you take 1 to 2 years of lease payments and stretch them out over the life of the financing (4 to 6 years?).

So I would say drive the 535 up to the milage you purchased under the lease and then turn it and roll the remaining payments into the financing of the new M5. Thoughts?