As someone who worked for BMW in the CSL period so far as I recall a buyer only has one decision to make and that was the colour, even then sometimes they had to settle for their second choice. BMW had to make the cars quickly to satisfy the Homologation ( they only had to make the cars to satisfy the FIA, not sell them...) so there was no time to allow special requests. IIRC they all had power windows (except possibly some very early cars...) , Petri wheels, alloy panels, etc....
They were VERY expensive cars but not without their problems...it was not unusual for the camshaft / rockers to fail sometimes before they were out of warranty. BMW at the time just fitted a new engine...(so much for matching numbers....). As for stainless steel bumpers, I have never seen one.
When the `new` 633 arrived in 1976 a lot of CSL owners traded them in but before we could re-sell them it was normal to do repairs to the tops of the from wings to `hide` the rust bubbles !
They were VERY expensive cars but not without their problems...it was not unusual for the camshaft / rockers to fail sometimes before they were out of warranty. BMW at the time just fitted a new engine...(so much for matching numbers....). As for stainless steel bumpers, I have never seen one.
When the `new` 633 arrived in 1976 a lot of CSL owners traded them in but before we could re-sell them it was normal to do repairs to the tops of the from wings to `hide` the rust bubbles !