How to change the oil on a Mercedes A-Class

Place a collection bin

Unscrew the drain plug with a 13 wrench.

Retrieve the drain plug and let the oil drain into the pan

Clean the drain plug and change the gasket

Loosen the oil filter bell with a 27 socket mounted on an extension.

Pull the filter out of the bell

Compare the new filter with the used filter

Remove the large diameter O-ring on the bell by sliding a screwdriver under the seal.

Remove the small diameter O-ring at the end of the bell stem by sliding a screwdriver under the seal.

Replace the new small O-ring by sliding it into the groove at the end of the bell stem.

Fit the new large O-ring by sliding it into the groove on the bell.

Replace the new filter by sliding it onto the rod

Reassemble the oil filter bell on the engine block by engaging the stem of the bell in the hole

Tighten the oil filter bell with the 27 socket.

Screw the drain plug with a 13 wrench

Unscrew the oil filler cap

Pour 4.5L of 5W40 oil using a funnel

Screw the oil filler cap back on