The CSL was introduced at the Geneva Motor Show in 1971 as a homologation model built to qualify the E9 for European touring car competition. Differences between the “L” (liecht) model and a standard CS included aluminum trunk and door panels as well as a plastic rear bumper, fixed Perspex rear side windows, and lightweight glass. This example is said to have been painted blue under previous ownership and then refinished in its factory Golf Yellow (070) under…