Warning! Prolonged skin contact with used engine oil is quite dangerous. Use a protective cream and wear gloves during this procedure. Change oil-soaked clothing immediately.
Recommendations
Frequent engine oil changes are the most important preventative maintenance procedure available to the amateur mechanic. Over time, oil is susceptible to dilution and contamination, leading to premature engine wear.
Engine oil can be pumped out using a special probe (available at gas stations) through the dipstick tube. After this, it is usually necessary to fill the system with oil.
Do not dispose of used oil with household waste or in any other way. This may cause environmental pollution.
When changing the oil, it is advisable to attach a tag to the engine with the oil brand and its viscosity.
The use of oils of different types has an adverse effect on engine operation. It is also not recommended to mix different brands of oils. Engine oils of the same type and brand, but of different viscosity, can be mixed if necessary, particularly in the off-season.
Necessary tool:
- Inspection pit or hydraulic lift with supports (if the oil is not sucked out).
- Head for unscrewing the drain plug.
- Special tool for unscrewing the filter (filter wrench, strap wrench or HAZET 2172 tool).
- Oil collection container (if the oil is not sucked out) with a capacity of at least 6 liters.
Necessary spare parts and consumables:
- Only if oil is not sucked out: aluminum or copper sealing ring for drain plug (sometimes supplied with an oil filter).
- Oil filter.
- Required amount of engine oil. Use oil approved by the manufacturer, refer to Specifications.
Removal engine oil
Engine oil can also be removed by suction, using a probe, through the dipstick hole.
1. Warm up the engine to operating temperature (oil temperature +60°C).
2. Raise the car horizontally.
3. Place a container under the oil pan to collect the used oil.
4. Remove the drain plug from the oil pan (1 in the illustration) and drain the oil completely.
Caution! If the used oil contains a large amount of metal shavings and wear products, this indicates the presence of scoring, for example, in the crankshaft bearings and connecting rod bearings. To avoid damage after the repair, it is necessary to thoroughly clean the oil channels and hoses. Additionally, it is necessary, if any, to replace the oil radiator.
5. Then screw in the drain plug with a new sealing ring. Do not exceed the tightening torques specified in the Specifications, otherwise this may lead to leakage and damage.
6. Lower the car onto its wheels.
Replacing the oil filter
1. Unscrew the oil filter from below. There is a special tool for unscrewing the oil filter, for example, HAZET 2172. You can also insert a pointed screwdriver into the filter from the side. After this, the oil will immediately start pouring out - place a container underneath.
2. Clean the oil filter flange with fuel. Remove any remaining gasket from the flange.
3. Lubricate the new oil filter gasket with a thin layer of engine oil.
4. Tighten the new oil filter securely using finger force only. After the gasket is seated against the flange, tighten the filter another half turn. Pay attention to the notes on the filter housing.
5. Tighten the drain plug with a new ring to the torque specified in the Specifications.
Filling engine oil
Caution! When starting the turbodiesel for the first time after changing the oil, it is necessary to ensure that the engine first runs at idle speed until the oil pressure indicator lamp goes out. Only after reaching the required oil pressure can the gas be increased. If the gas is given when the indicator lamp is lit, the turbocharger may be damaged due to insufficient oil.
Publication reprinted from this resource [mercedesman]
1. Open the cap and pour new oil into the filler neck of the cylinder head cover.
2. When changing the oil, use new oil of the same type and, if possible, the same brand. Each time you change the oil, attach a plate to the engine indicating the brand and viscosity of the oil you have added.
Attention! It is recommended to initially fill in 0.5 l less oil. Warm up the engine and after a few minutes, check the oil level using the indicator, top up if necessary. Remove excess oil, otherwise the engine seals and catalytic converter may be damaged.
3. Add oil up to the MAX mark. If the oil level is higher, the oil must be sucked out.
4. After a test drive, check the drain plug and oil filter for leaks and carefully top up with oil if necessary.
5. After 3 minutes from stopping the engine, check the oil level again and add or remove oil if necessary.