For the 2.3 W201:

According to the wizards at Stuttgart:

Inspection at 800-1000 miles

Lubrication Service every 7,500 miles or twice a year (spring & fall)

Maintenance Service every 15,000 miles or two years

Additional Work every 30,000 miles

MB suggested replacing oil and filter every 3750 miles for "hard and sporty" driving

Auto trans fluid change every 15,000 miles, filter and fluid at 30K intervals

Brake fluid annually, preferably in the spring.

Coolant change at least every 3 years.

Lube enging throttle, linkage rods and shafts every 7,500 or twice a year (thats a lot of grease!)

Cats might need replacement after 50K miles

Every 15K: oil/filter, new plugs, lube throttle parts, door hinges, door locks and hood. Check fluid levels, inspect everything else for wear and tear.

Every 30K: oil/filter, air filter, check V-belt, replace O2 sensor (warning light comes on @ 60K), replace plugs, check clutch, flex discs

Every 60K: Replace fuel filter

Once a year: Replace brake fluid, clean water drains, clean and lube sunroof rails and sliding blocks