I have a Mercedes 2003 C230 Kompressor with 140,000 miles. I have only done the oil and filter every 3,000 miles. When shall I change the start plugs and the fuel filter?
Stick with old school every 3k miles, you should have your transmission flush/change filter with that many miles, it will make your tran-ny last allot longer. spark plugs and fuel filter every 50k. stick with 93 octane, it worth spending .10 cent more keeping your injectors and valves clean or run it once a month full tank.
IMO i think changing the tranny oil causes the filter to clog A LOT faster creating a blockage and you dropping your tranny while driving it. I have found that letting the tranny oil go for the life of the tranny.
Is a better option then changing it at all. BUT always add tranny fluid when low...obviously
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Check your owners manuel..if you have none than purchase one.
I would say leave them alone .
If the plugs have never been changed at 140,000 you should change them. Spark plugs nowadays last about 100,000 miles. The fuel filter should be changed every 10-15,000 miles. Also everytime you do an oil change you should check the air filter.
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