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As to the AMM, my 98 C230 has 160K now, and its got it's original AMM. There is some thinking that changing the engine air filter frequently increases AMM life, and I think there might be something to it. Based on that info, and also wishing to keep clean air going to my engine, I changed my air filter every 15,000km's or so. So far, it seems to have worked. (Touching wood!)
Here is the schedule that I keep (using the FSS)
1. Engine oil and filter changed about every 7500km's with Mobil 1 and OE filters. I do it every time the FSS counts down 5000km's which works out to about every 7500km's.
2. Cabin dust filter every 15,000km's. This keeps the load on the blower motor and evaporator down, and keeps nice clean air in the cabin. Easy job I can do in less than five minute now. Use the updated W210 combi filter. I don't think you can get anything else now, but just in case...
3. Engine air filter every 15K. I vacuum the housing and change the filter.
4. Coolant every other spring.
5. Brake fluid every other spring, or when changing pads/discs.
6. Final drive oil every 80K.
7. Tranny fluid and filter every 100K.
8. Spark plugs every 60K. They just don't last out to 72K in my experience, and by 60K need doing.
9. Fuel filter every 60K.
During each 15K service, I also get under the car and check the suspension components, exhaust system and flex discs. I look for leaks (all kinds) and have a gander at the final drive unit. I also pop a front and rear wheel off and check the pads.
Things to know...
1. The M111 engine is tough as nails, but don't overfill the crankcase, as you'll damage both main seals. My dealer did this, and both had to be replaced. It was the last oil change I did not do myself.
2. Watch for front lower ball joints. They are a wear item on the W202, and in Canada we don't have glass smooth roads, so they tend to wear quite quickly here. They often squeak when beginning to wear.
3. Final drive units often sweat. My seals were replaced at 80K when the final drive unit was serviced, and they've been drum tight since. If not replaced under warranty, I understand they can sweat for years without really leaking.
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