500sl abs and asr lights on. Occasionally shuts down on ruff roads

The ABS light is most probably due to a dirty wheel speed sensor. It's located in front of the brake caliper assembly. You will see a large connector on it and a wire going to it. Remove the one screw and pull it out. On the end is a magnet, clean that area real good and reinstall.

Thanks, I'll try to check out the speed sensor and let you know how it works.