They told you wrong. They fit perfectly in the 18” Aeros, and they fit in the 18” T Sportline with a little manipulation: Even though T Sportline says the factory Tesla center caps will fit their wheels the fact is that T Sportline’s center caps are 57mm, and Tesla’s center caps, ALL of Tesla’s center caps are 58mm. In order to get the Tesla center caps to fit into my T Sportline wheels I had to carefully remove the metal part of the cap from the plastic backing by prying up the tabs. Then I took a razor knife, and carefully trimmed the little ridge that is on the outside edge of the plastic backing. Once I did that I replaced the metal cover, bent the tabs back in place and working against a vertical wooden surface (I used a drawer in my work bench) I pressed the edge of the metal cap into the now slightly smaller plastic backing. I had to work around the edge two or three times on each cap, and occasionally had to push the tabs back down a little. Finished product below.
I had absolutely no problem buying the black caps, and yes the caps are for the larger MX wheels. In fact, the parts guy at my service center told me that at the time, but then said, “But all of the center caps are the same size, so it will fit your 18” wheels.” If the parts department at your service center won’t do it I would suggest having a conversation with the GM of the service center.
View attachment 349536 View attachment 349537