- inspection pit or hydraulic car jack with dummy goats;
- a set of interchangeable socket heads for removing the oil filter cover and oil drain plug;
- sump (if the oil is not pumped out) with a capacity of at least 8 liters of oil.
The following wear parts are required:
- if the oil is not being pumped out: aluminum or copper O-ring for the oil drain plug (sometimes supplied with an oil filter);
- oil filter cartridge.
Fill with 5.8 to 7.5 liters of engine oil depending on the engine. For diesel, respectively, from 6 to 7 liters. Use only engine oil recommended by Mercedes.
Amount of oil to be changed
| 4-cylinder petrol engine | 5.8 l |
| 6-cylinder petrol engine | 7.5 l |
| 2.0 L diesel engine | 6.0 l |
| 2.2 L diesel engine | 6.5 l |
| 2.5L diesel engine | 7.0 l |
The oil should be changed once a year. If during this period the car travels more than 15,000 km, then the oil should be changed after a run of 15,000 km. The filter cartridge is replaced at the same time.
Under severe operating conditions such as short distance driving, relatively frequent cold starts and very dusty road conditions, change the oil and oil filter at shorter intervals.
With a petrol engine, engine oil can be pumped out at a petrol station using a probe through the oil measuring tube. Do not throw away uncontrolled waste and do not mix it with household waste, as this causes irreparable damage to the environment, such as groundwater pollution.
Draining engine oil
1. Warm up the engine to operating temperature until the coolant temperature indicator indicates that the coolant has reached its normal operating temperature. Then drive at least 5 km more to ensure that the engine oil temperature is also sufficient.
2. Unscrew the oil filter cap (2) using a suitable interchangeable socket. This allows the engine oil to drain from the oil filter into the oil pan
3. Remove the oil filter cap (2) together with a filter cartridge fixed with spring clips (4).
4. Suck out the engine oil with an oil suction device through the guide tube of the oil level indicator. If you do not have an oil suction device at your disposal, then drain the engine oil.
5. Level the car using jack stands or jacks.
6. Remove the bottom protective cover of the engine compartment.
7. Install a waste oil container under the oil pan.
8. Remove the oil drain plug from the oil pan and completely drain the used oil.
Attention! If there are large amounts of metal chips and abrasion products in engine oil, then this indicates malfunctions associated with seizing or corrosion of individual parts, for example, damage to the crankshaft or connecting rod bearing. To prevent the possibility of subsequent malfunctions after the repair, be sure to thoroughly clean the lubrication channels and oil hoses. Additionally, if present, replace the oil cooler.
9. Then screw in the oil drain plug with a new O-ring and tighten it tightly to 25 Nm.
10. Install a new filter cartridge in the oil filter (4).
11. Screw on the oil filter cap with a new O-ring (3). Tightening torques: aluminum cover - 20 Nm, and plastic cover - 25 Nm.
12. Open the screw cap and pour oil into the filler pipe of the cylinder head cover.
Attention! First, it is recommended to pour less than 1/2 liter of engine oil, leave the engine to warm up and after a few minutes check the level using the oil level indicator, top up with engine oil if necessary. Excess engine oil must be pumped out, otherwise the engine gaskets or catalyst may be damaged.
Attention! Engine oils of type CD, which are offered by the manufacturer exclusively for diesel engines, are not suitable for internal combustion engines with positive spark ignition of the working mixture.
13. Open the screw cap and pour oil into the filler pipe of the cylinder head cover.
14. Lower the car.
15. After a test drive, check the tightness of the oil drain plug and the oil filter, tighten the screw connections carefully if necessary.
16. With the engine warmed up to operating temperature, check the oil level again about 3 minutes after stopping it, make adjustments if necessary.
17. Establish below a protective cover of a motor compartment.
Attention! In order to better check the operating conditions of the engine, the same type of oil and, if possible, the same brand should be used each time the oil is changed. Therefore, it is advisable at each oil change to pay attention to the reference plate attached to the engine, on which the brand and viscosity of the oil are marked.
Attention! The indiscriminate use of different types of oils is unfavorable. If possible, engine oils of the same type but different grades should be mixed. If necessary, engine oils of the same type and the same brand, but with different viscosities, can be topped up at the turn of the seasons.
Visual control of oil leakage
1. On an oil lubricated engine with high oil consumption, check where the oil is leaking.
- 1a. Open the oil filler cap and check the seal for porosity or damage.
- 1b. Crankcase ventilation system: for example, a ventilation hose from the cylinder head cover to the throttle body.
- 1c. Cylinder head cover seal.
- 1g Cylinder head seal.
- 1d. Oil filter seal: oil filter cap.
- 1e. Oil drain screw (sealing ring).
- 1zh. Oil pan seal.
- 1z. Oil seals front and rear of the camshaft and crankshaft.
2. Since in the presence of leaks, in most cases, the oil is distributed over a relatively large surface of the engine, it is impossible to determine an oil leak at first glance. When searching, it is advisable to do the following.
- 2a. Wash the engine. To do this, spray the engine with a standard low-temperature detergent and, after a short exposure, rinse with a water jet. Pre-close the generator with a plastic cap.
- 2b. Dust with lime or talcum powder the separation and sealing points on the outside of the engine.
- 2c. Check the oil level, add oil if necessary.
- 2y. Take a test drive. Since the oil becomes thinner when the engine is hot and is therefore more likely to appear at the leak points, this test drive should be carried out for a section of about 30 km on the highway.
- 2d. Then inspect the engine with a lighting lamp, localize the leaky place and eliminate the defect.
Checking the oil level
Attention! The engine should not consume more than 1.0 liters of oil per 1000 kilometers. Higher flow is a sign of worn valve stem seals and/or piston rings or oil seals.
Attention! When measuring the oil level, the vehicle must be on a level surface.
Attention! The engine must be warmed up to operating temperature.
Attention! After stopping the engine, wait at least 3 minutes for the oil to collect in the oil pan.
1. Pull out the oil level gauge (1) and wipe it with a clean cloth.
2. Insert the measuring rod into the guide tube as far as it will go and pull it out again. The oil level must be between both marks.
Attention! Add new oil only if the oil level approaches the "min". Oil volume from "min" up to the mark "max" is approximately 2.0 liters.
Attention! Oil is added to the valve (2) cylinder head covers. When topping up, use the correct type of oil, do not use oil additives.