I have the S model with cloth interior and manual adjustments. The seat is narrower than the Sonata I traded. I've gotten it dialed in pretty well but still benefit from a seat cushion I've used for several years and a few cars now.

Auto Drive 1PC Seat Cushion Memory Foam Black - Universal Fit - Walmart.com
Tomorrow Buy Auto Drive 1PC Seat Cushion Memory Foam Black - Universal Fit at Walmart.com
www.walmart.com