I found some Rust-Oleum spray paint that matches the trim color on my 1988 W124 that is perfect for touch-ups. It is called Charcoal Gray spray enamel and is available at most department or home improvement stores for under $4. Thought I would pass on this information to others.

MBZ used this gray paint on the rocker panels and windshield wiper arms.....oops, arm for a number of years on the 124.