3.7. Replacement of motive oil and oil filter

General information

The long contact of skin with the fulfilled motive oil is quite dangerous. Use protective cream and put on gloves during this procedure. Replace the clothes which became impregnated with oil immediately.

Regular and frequent replacement of motive oil is the main preventive procedure of service, to the available amateur mechanic. Eventually oil is subject to fluidifying and pollution that leads to premature wear of the engine.

Motive oil can be in case of need extorted by means of the special probe (it is usually possible to take in temporary use at gas stations) through the directing tube of the measuring probe.

On merge the fulfilled oil in the sewerage by no means!

Expediently after performance of replacement of oil to fix on the engine a label with the indication of brand of the filled-in oil and date of implementation of the procedure.

Use of oils of various types adversely affects operation of the engine. At all also mixing of oils of various brands is not allowed. In some situations (in particular, in off-season) mixing of motive oils of various viscosity, on condition of their coincidence on type and brand is allowed.

Necessary tool

Necessary spare parts and expendables:

Discharge of motive oil


  1. Warm up the engine up to the normal working temperature.
  2. The car also establish to Poddomkratta it horizontally on props.
  3. Get under the case pallet capacity for collecting the fulfilled oil.
  1. Turn out a drain stopper from the case pallet (see сопр. an illustration and) and completely merge oil, - if the drain stopper is located not in the lower point of the pallet of a case of the engine, it is necessary to use the special device for oil pumping out (see сопр. illustration b).

    1 — a drain stopper
    2 — the case pallet



If in the fulfilled oil there are at a large number a metal shaving and products of wear, it indicates existence of zadir, for example, in bearings of a bent shaft and conrod bearings. For an exception of damages after the made repairs it is necessary to clear oil channels and hoses carefully. It is in addition necessary if is available, to replace the oil heater.

  1. Wait when oil stops following through a drain opening, then screw into place a stopper, previously having replaced its sealing washer, - track that the stopper was tightened with the required effort, - excessively hard tightening of a drain stopper is accompanied by risk of damage of tightness of its landing.
  2. Lower the car on wheels.

Replacement of an oil filter

Petrol models


  1. Extraction of a working element of an oil filter (petrol models).

  1. The cover of a cassette oil filter is located from above on the engine, in the left forward corner of the last (see an illustration the Motive compartment of petrol models (on the example of G55 AMG)).
  2. By means of a special nozzle (103 589 02 09 00) release a carving cover (2) casings (5) of an oil filter and take it assembled with a working element (4).
  3. The short blows struck to the central core beat out a working element from a cover in the prepared drain capacity.
  4. Replace a sealing ring (3) covers (2).
  5. Fill a replaceable working element (4) in a casing (5) of assembly, then put into place a cover and tighten it by means of a special nozzle (see paragraph 3).

Diesel models


  1. The corresponding illustrative material is presented on сопр. illustrations

    and — Extraction of a working element of an oil filter (the G270 CDI model with the M612 engine)
    b — Extraction of a working element of an oil filter (the G400 CDI model with the M628 engine)
    1 — the Cover
    2 — the Sealing ring
    3 — the Working element



  1. The order of implementation of the procedure is similar described above for petrol engines. On the models equipped with the series 612 engine for the purpose of ensuring access to the filter it is necessary to dismantle previously the panel of finishing of a head cylinders/assembly of the air cleaner.

Gas station of fresh motive oil

At the first start of a turbodiesel after performance of replacement of oil it is necessary to watch that the engine at first worked on single turns, the control lamp of pressure of oil will not go out yet. Increase in turns of the engine at the burning control lamp is accompanied by risk of failure of a turbocompressor!


  1. Gas station of oil is made through the special, equipped with a cover jellied mouth in a cover of a head of cylinders (see illustrations the Motive compartment of petrol models (on the example of G55 AMG), the Motive compartment of the diesel G270 CDI models and the Motive compartment of the diesel G400 CDI models).
  2. When replacing oil apply new oil of the same type and, whenever possible, the same brand, as merged from the engine. For the purpose of minimization of spraying use a funnel. At each replacement of oil attach to the engine the plate with the indication of type and brand of the filled-in oil, and also date of performance of replacement.
  3. At the first stage fill in in the engine approximately at 0.5 l of oil less, than it is specified in Specifications, then warm up the engine and, several minutes later, check level, - in case of need, make the corresponding adjustment, having brought level to mark MOVE in an edge of the measuring probe.

Surplus of oil should be pumped out from the engine in order to avoid risk of damage of sealing elements of the engine and failure of the catalytic converter.

  1. After a trial trip check tightness of landing of a drain stopper and cover of an oil filter.
  2. About 2 minutes later after a stop of the engine double-check oil level, in case of need make the corresponding adjustment.