W111 Cabriolets (111023 and 112023) did not come with MB-Tex. Only leather interior.
There was also - on special request - an interior material available made of cloth (inner) and leather (outer part of the seats), and the cloth material llokes very similar to the one used with 300 SLs.... but this is very, very rare.
MB-Tex was not an option for 111 C's.
Which interior code does your datacard list for your car?
My wiper motor is stuck (not fuse)
For sure ....? Mostly it is the wiper linkage (and there the wiper shafts) which are stuck, not so often the motor itself.
Have you checked that?
