The upper dashboard leather is prone to bubbling and pulling away at the seams. Commenters report Mercedes offers an improved/revised dash part (list around $5,940) and quotes running $7,400-$8,600 installed at 10 hours labor; several note Mercedes would not cover it under warranty, though at least one dash bubble was replaced under warranty on a newer car.
Dashboard leather delamination and bubbling
Mercedes-Benz SL (R231) · cosmetic