I sent an email to Star Classics and got a very quick reply regarding fitment for the 250 and 280. They agreed that it was a mistake, and I quote as follows:
"I’ll take that info off of eBay right now. I DO know it is correct for the 230SL. Definitely fits the W189 and W199 Also make the version for the W198 and have not had a comeback in 10-14 years. So, it comes, comfortably with a one year warranty. It is also rebuildable by us, down the road if necessary."
Cheers,
CT