Wait until rattles start on and around the dashboard. My 150 has this annoying rattle and haven’t the foggiest what it is and apparently Leon’s are notorious for rattles and loose parts
Had a MY18 FR that developed a few rattles about a year into owning it. Most notably the passenger side A pillar.
Took delivery of a MY20 Cupra last Thursday - rattles are already there. Coming from the passenger side footwell area.