Sequence of work
"Daily Maintenance"
1. Before starting the engine, check the oil level on a cold engine.
2. Install the car on a horizontal platform.
3. Wait 5 minutes for all the oil to drain into the crankcase.
4. Pull out the dipstick. Wipe the dipstick with a clean cloth. Insert the dipstick all the way into the socket, wait a bit and, removing it, check the oil level again.
Pic. 4.34. Dipstick marks
5. If the oil level is on the dipstick between the markings, everything is in order. Oil should be added only if its level approaches the mark «minimum». Zone between markings «minimum» And «maximum» corresponds to a volume of 2 l (pic. 4.34).
6. Use a clean funnel to add oil.
7. Add enough oil so that the level is below the mark «maximum» (top marking).
ASSYST system - oil control while driving
Since March 1997, a new ASSYST service system has been installed on Mercedes cars to control the oil while driving. The system is based on years of research into engine oil life. Oil for cars that are driven exclusively in the city and for short distances, «produced» already after 5000 km. Whereas vehicles used primarily for long distance travel and on highways at speeds between 80 and 150 km/h, oil change intervals approach 30,000 km. These different engine operating conditions are taken into account by the ASSYST system. The microcomputer, based on information received from various sensors, registers the actual condition of the engine oil and makes a plan for caring for the engine. One of the indicators «aging» oil, for example, fixes the content of iron particles in it, which increases sharply already after 5000 km when traveling over short distances.
In order to be able to determine the factors affecting the oil level and consumption, Mercedes-Benz has developed a special sensor. It heats up when the oil level is too high or too low, and it also determines when the oil needs to be changed. In addition, the sensor detects a change in the structure of the oil, such as metal, fuel or coolant additives in it, and warns the driver about this. By pressing the corresponding button with the ignition on, the display will show the condition and oil level.