Oil change Mercedes-Benz CLK 1997 - 2003 | Haynes Manuals
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The sump plug is located on the base of the engine
You will need to remove the undertray
Undo the fixings - use a 8mm socket. Caution! The undertray is heavy and must be fully supported during removal
Carefully remove the undertray
Here's the sump plug
Don't forget to place a suitably sized receiving tray beneath
Using a 13mm spanner or socket, carefully remove the sump plug and fully drain the oil.
When the sump has emptied, wipe clean the sump plug area with a paper towel and fit a new sump plug and washer - do not over tighten. Replace the undertray