Looking at a 2002 S55, and had a PPI done at my local dealer.

Typical results - mostly non-worrisome, with the exception of 2 transmission related codes:
P2001 and P2602. 2001 is something about the TCM being shot, and 2602 has something to do with "valves".

No messages about transmission issues in the display, and car drives exceptionally in all modes and under all conditions.

Any ideas?