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First off I have to assume the that the engine arrangement is the same for the 2001 as a 1999 model.

1. Remove the air inlet cover that runs over the top of the engine by unclipping at the air filter end and loosening the massive jubilee clip at the other end and sliding it off the rubber retainer.

2. Using a suitable sized Allen key remove the cover on top of the engine block. You should now see the HT leads leading to the sparkplugs.

3. Two of the sparkplugs are accessed by pulling up the plug cover two have covers held by male torx bolts. You will need to uy a special female torx bit for this. Unscrew these and pull up to access spark plugs.

4. Loosen the sparkplugs with a suitable deep socket. I found it easiest to loosen the plugs and extract by pushing the covers over them. The rubber grips the plug and it can be pulled out from the deep recess.

5. replace with new plugs and working in reverse, fit all the bits back that you have removed.

I hope you find this useful.

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12y ago
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Q: How do you change the spark plugs on a Mercedes C Class 2001?
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