You can't count on listings for a 34-year-old car to be completely accurate. Match the blades up by size and attachment type.
I need 21" blades according to rockauto.com
The 560 SL has 18" blades so they probably won't work.
I guess ordering the same blades in 21" should work fine then?
That would be Rain-X 830121 Silicone Endura Wiper Blades.
I guess ordering the same blades in 21" should work fine then?
It depends on whether those blades will fit your wiper arms. It looks like the Endura blades come with a variety of adapters for different types of wiper arms. If your car has one of the types listed the blade should fit:
https://www.rainx.com/instructions/silicone-endura-blades/
all you need to do is measure your blades and get the same length. Or in my case, I went even bigger!
I think Scotty Kilmer recommended this make https://www.piaa.co.uk/wipers/wipershow.asp?id=1199&make=LEXUS&model=IS+220d%2F250&year=LHD+%2F+RHD+11%2F2005+-+05%2F2013
I'm planning on replacing them with this anyway. Kinda pricey though. 🙄 I think there's a connection to getting cheaper as you get older.
