Originally the Textile seats did not have position memory, lumbar adjustments or seat heaters. With the small price increase at the start of 2013, Tesla upgraded textile seats to have all these features. Some users who paid for the price increase, but got the old seats were retrofitted to the new seats. We expect that makes it possible to upgrade any of the older cars. Very few cars were actually built with Textile seats in 2012, as most of the cars delivered were Signature cars, which included leather seats as part of the price.