This is our third Hyundai Sonata with the exact same problem. All three have had the panoramic sunroofs. We’ve had a 2013 Limited, a 2015 Limited with Nav, and a 2016 Hybrid Ultimate. All 3 have been worked on repeatedly. Every time we go in for a 6000km maintenance we get them to try to fix it. We also book repairs in between those maintenance visits to try to get it fixed. We have put on a cumulative 90,000km...that equals a lot of trips to the dealership and the problem is NEVER resolved! It is embarrassing to take friends in our car when a brand new car like these keep squeaking and creaking. My parents have a Sonata without the panoramic sun roof and their car is silent. We have even had the entire weatherstripping replaced on the sunroof, “bolts tightened”, “metal shavings on the track filed down”, greased, “adjusted”, inspected...etc. I feel like after 3 years and 3 model generations Hyundai should have been able to weed out this problem from their vehicle.