What is the reason for all the dashboard lights of the Mercedes-Benz E260 being on and the engine not turning off?

[JordanAnn]

Mercedes-Benz E260 fault lights all on and the engine not turning off reasons are as follows: Fuel quality issues: The fuel quality is poor and does not meet standards. Some car owners find that the engine fault light comes on immediately after refueling, usually caused by filling up with poor-quality fuel at non-standard gas stations. This situation does not affect the vehicle's driving but can cause damage to the engine. Carbon deposits in the engine and spark plugs: After a period of use, the engine will accumulate some carbon deposits, which can lead to engine damage, difficulty starting, poor acceleration, excessive engine noise, and other phenomena. The accumulated heat can cause the engine to misfire, leading to engine knocking. In this case, the engine fault light will come on.