The small strip of bodywork underneath the headlamp is a separate section; I assume it is available without the hole for the wiper shaft, because the 300SL up to 1994 and the SL280 up to 1995 did without headlamp wash/wipe as standard. I would have thought that removing the motors and shafts is fairly easy, simply blank off the end of the wiring loom; as for the water supply, trace it back to the washer bottle and remove that feed. If necessary you can always fit components from a 300SL or SL280.

Some of the 500E guys in the hot rod forum have removed their headlamp wash/wipe and replaced it with cooling ducts, so they must know how to do it; the principles are surely the same. I remember a long post on the subject some time ago.

You may find it is a legal requirement to have some headlamp cleaning mechanism with xenons, I'm fairly sure it is in Europe.

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190