What causes the Phaeton's accelerator to be unresponsive?

[RileyRose]

Generally, it might be due to excessive carbon buildup in the engine. Below is relevant information: Regular maintenance: Regular oil changes not only make the engine run more smoothly and powerfully but also help inhibit the formation of carbon deposits inside the engine. Of course, fuel quality is also important; using the appropriate grade of gasoline from reputable gas stations ensures more complete combustion, resulting in less carbon buildup. For cars, engine oil is extremely important to the engine. Carbon cleaner: There are many carbon cleaners available on the market for removing carbon deposits, but they cannot achieve a thorough cleaning. Frequent use of such cleaners may cause corrosion and aging of rubber hoses. Generally, cleaning once a year or every 20,000 to 30,000 kilometers is sufficient, depending on the engine's condition. There's no need for disassembly unless absolutely necessary or if the engine is being disassembled for other reasons, in which case carbon cleaning can be done as a secondary procedure.