I doubt anyone would spend the time and money to remove the switches, replace the panel to get rid of heated seats circutry. what you found is probably the remants of a "after market" cell phone installation, where the transmitter was located below under the seat cushion. The seat option would have consisted of not only the switches, the wires, the timers to shut them off after a pre determined time but also the heather pads that are installed in the cushions.
run the VIN
http://old.mbclub.ru/mb/vin/?lng=eng
If you are thinking thermo electric cooling forget it. Thermoelectric cooling, also called "the Peltier Effect," is a solid-state method of heat transfer through dissimilar semiconductor materials.