Where is the air filter on a 2007 Mercedes CLK 350?

The air filter on a 2007 Mercedes CLK 350 is located in the engine compartment, specifically on the driver's side. To access it, you will need to remove the engine cover and the air intake duct. The air filter itself is housed in a rectangular air filter box and can be easily lifted out for replacement. Always ensure the engine is cool before attempting to change the air filter.