According to the regulation of oil in petrol engine Mercedes E-class W211 needs to be changed once a year or every 15,000 km. However, the external drivers of the vehicle should also be taken into account.
As for the candlelight, the producer states that the candles need to be changed once in 100,000 km. If the car is used in Russia, it is recommended to change the candles more often, because the low quality gasoline on the candles remains suntanned. In such a case, the fuel consumption may increase, as well as the periodic occurrence of misfire. As a general rule, such symptoms may occur after 30,000 km. If no such "symptoms" are found, it is necessary to replace the candles with the onboard computer.
