2. Make sure you have all the necessary tools to begin this job. You should have enough rags or old newspapers to soak up any spilled oil. It is best to change the oil while the engine is still hot after work - dirt is suspended in it and will drain easily along with the hot oil. At the same time, be careful not to touch the exhaust pipe and other hot parts of the engine when working under the car. To avoid burns and skin irritation from contact with used oil, wear rubber gloves. Access to the underside of the car is greatly improved if the car can be raised on a lift, driven onto a ramp, or jacked up and supported (see "Lifting and Supporting the Car"). Regardless of the method of lifting the car, make sure the car is level or, if at an angle, that the drain plug is at the lowest point. Where necessary, remove splash guards from under the car.
3. Working in the engine compartment, locate the oil filter housing in the left rear corner of the engine, behind the intake manifold.
4. Place a rag or cloth around the base of the housing to collect any spilled oil.
5. Where provided, remove the clamp or unscrew the screw (depending on what is used) and remove the rubber gasket from the bulkhead at the rear of the engine bay. This will improve access to the oil filter housing (see fig. 3.5).
Fig. 3.5. Remove the retainer (1) and remove the rubber gasket from the partition
6. On models with an oil drain pipe installed in the center of the oil pump cover, unscrew the pipe and remove it from the filter housing (see fig. 3.6). Where it is installed, remove the sealing ring and destroy it - a new one will be required during installation.
Fig. 3.6. Unscrew the oil drain pipe (shown by arrow)
7. Loosen the two mounting nuts, then lift the oil filter cover (see fig. 3.7). Remove the sealing ring and discard it - a new one will be required for installation.
Fig. 3.7. Unscrew the fastening nuts (shown by arrows) oil filter housing covers
8. Working from underneath the vehicle, loosen the drain plug on the sump about half a turn (see fig. 3.8). Place the oil receiver under the hole and unscrew the plug completely. When unscrewing by hand on the last two threads, if possible, try to press the plug against the pan (see Haynes advises).
Once the plug is unscrewed from the hole thread, remove it quickly so that the stream of leaking oil gets into the oil receiver, and not into your sleeve.
Fig. 3.8. Drain plug of the pan (shown by arrow)
9. Remove the sealing ring from the plug.
(Text republished from the website: www.mercedesman.ru)
10. Wait a while for the old oil to drain out of the crankcase, keeping in mind that you may have to move the oil receiver so that the dripping stream gets into it.
11. Once all the old oil has been drained, wipe the plug with a clean rag. Replace the sealing washer. Clean the area around the drain hole, then install and tighten the plug.
12. Remove the old oil and all tools from under the car, then lower the car to the ground (if required).
13. Lift the filter element by the provided handle (see fig. 3.13).
Fig. 3.13. Lift the filter element by the handle
14. Wipe the oil filter housing and cover with a clean cloth. Check for blockages in the oil return pipe (either separately or together with the lid) - you can blow through the small hole at the top of the tube and check for air coming out of the base of the tube (see fig. 3.14). Clean the tube and blow it out with compressed air if necessary.
Fig. 3.14. Check if the small hole is clogged (shown by arrow) on top of the oil return pipe
Warning: Wear eye protection when using compressed air.
15. Install a new sealing ring onto the oil filter housing cover (see fig 3.15).
Fig. 3.15. Install a new sealing ring (shown by arrow) on the oil filter housing cover
16. Install the new filter element onto the housing (with a handle on top), then install the cover and tighten the mounting nuts to the required torque.
17. Where specified, install a new O-ring onto the oil return pipe, then install the pipe and tighten to the specified torque.
18. Remove the dipstick, then unscrew the oil filler cap on the cylinder head cover. Fill the engine with the required oil (see "Weekly checks"). To reduce oil loss, you can pour in the oil in a thin stream or use a funnel. First, pour in half the required amount of oil, then wait a few minutes for the oil to drain to the pan. Continue adding oil in small portions until the level reaches the lower mark on the dipstick. Then add oil to the required level of the upper mark on the dipstick. Insert the dipstick and close the oil filler cap.
19. Start the engine and warm it up for a few minutes, check for leaks around the oil filter housing and drain plug. Note that it may take a few seconds after starting the engine for the oil pressure warning light to go out.