My old 9-5 has cloth interior and no heated seats. I've have found a local listing for a used leather interior for a good price, but the seller isn't sure if it's heated or not. The seller is a local wreckers and the car itself has empty spaces where seat heating switches should be. Is it possible to distinguish in an easy way if the new seats really do have heating? Perhaps there is an extra wiring in place or the heater elements can somehow felt with hand?