Hmm ...
The (European, non-specific-US) parts list(s) do(es) not specify directly between 305 mm (millimeter) and 330 mm wiper blades per se but only that much:
There were two different wiper blade inserts (just the rubber) available:
000 824 08 27 for all cars until 044 (= 280 SL) serial 001199
and
000 824 12 27 for all later 044s from serial 001200 on.
The latter is still available from MB, the earlier one replaced by
000 824 50 27.
That one is also available but very pricey (3x as much as the 12 27).
Although I do not have these rubber inserts in front of me, I am pretty confidient that the later style (000 824 1227) is the 330 mm version and the other one(s) the shorter 305 mm version.
At least that appears logical to me.
With the complete wiper blades (rubber with metal holder) the situation is a bit more complicated.
Finding any of the original MB (= Bosch) wiper blades (rubber with metal holder) is a challenge today as all are NLA currently.
The last one available was the A113 820 0545.
I have an old pair of these flying around somewhere and will look up for you this weekend whether those are 305 or 330 mm long.
Maybe Bud's Benz or K&K or others still have some in stock.
Hello Bootes,
"Correct wiper blades for the W 113 series are 12.1" (305 mm) in length . . . 230 SL and '67 250 SL (polished); '68 250 SL and early 280 SL (painted); and late 280 SL (skeletonized)."
You definitely need the late(st) style of wiper blades, the skeletonized ones.
Achim