Hello, I'm not sure how this fits within the timing described above, but my 280 (chassis 2230, early '68) has the bumper guards, but they are definitely not on the special order receipt, nor on the window pricing sheet that I just found. I did however run into a single page instruction along with the window options sheet that shows where to place the holes in the bumper and how to mount the "horns", all in German. I am wondering if this was a local dealer installed item, like the AC, because I cant understand why else I would have these specific instructions and nothing else like that. But they are in German, which wouldn't make sense going to a US dealer? Also wonder if it has something to do with the 250->280 production transition? Anyway, an interesting mystery, and I'm attaching a picture of those instructions that have a drawing and dimensions in case anyone can read a little German and make sense of it.
Thanks again to all on this site for contributing so much good detail and making my life so much easier over the last few years that I've been doing the "50 year maintenance plan" on my 280 after pulling it out of the storage heap it was in for decades. Fun fact, I can see on the invoice they up-charged my dad $159 for delivering a 280SL instead of the 250SL he ordered. I do remember him being mad and threatening not to pay it. So, I wonder, whats the return on that $159 ?
regards, Mark