There are three switches for the seat heaters: one for each front seat, and one for the whole back seat. There is a switch for heating the steering wheel. We think the side mirrors are heated whenever the rear defroster is on, but I'll confirm that.
The residual value of our lease is ~$12,200 for the 3 year old <36,000 mile Leaf S. MSRP new was ~$31,500, I think.
We have a Massachusetts
MOR-EV rebate program - $2,500 for a vehicle with a plugin battery pack >10kWh (so the Volt qualifies, and all EV's), $1,500 for vehicles with a plugin battery pack <10kWh (so the Plugin Prius qualifies), and $750 for an electric motorcycle.