Hauser,
I think Wordluph are wrong, and they should be like Bob's, Alfred's and mine.
Gentlemen...,
No, they are not. Worldupholstery is correct.
The "not-pinched" or "pinched" pipes or flutes is a question of serial number and not of 'correct' versus 'incorrect'.
Enclosed are two pics from the Motoringinvestments homepage.
I know that car personally. The leather of the (approx.) June 1970 car is absolutely and utmost original and untouched. It shows the pinched leather piping.
Since the rucksack on one of the pics is mine I allowed myself to "place" the pics here.
Unfortunately, I don't exactly know which serial number this was changed during the 280 SL production run.
The (sequentially last) parts list 10202 for the 250/280 SL tells me that there was a change of the seat covers with serial 013416 ... I don't know whether that has to do with the pinched pipes or not but I assume so.
This numbering correlates with the attached pictures, since the silver 280 there has a later serial no.
250ies and 230ies always had non-pinched piping, as have the early 280ies.
I don't know exactly about the MB-Tex but this is/was the way correct for the leather.
Achim
(2 cars without pinching, one 114 with pinching)