Hi Mike, Yes You can Remove the Seats out of your Car and Swap the Leather seat covers...You Must Remove the The Heated Pads from the old seats and resew the Heating pads to the NEW seat covers..Lots of Time But Yes It Can Be Done...Im Doing this In My W210 wagon..Installing Heated Seats Into a Car That Was Built Without Heated Seats...Major Pain But Worth It!
Except I Have to Install A Harness,New Center Wood,and The Seat Mod..But Ahhh Heated Seats Are Nice!Even In So Cali

Good Luck!

Mark