Why is my Audi A4 having trouble starting?

[LukeDella]

Audi A4 having difficulty starting is due to issues with the electrical circuit and ignition system. Gasoline engines rely on an ignition system, which primarily consists of spark plugs and ignition coils. Spark plugs are wearable parts that require regular replacement. If spark plugs are not replaced for an extended period, the electrode gap will widen, affecting normal ignition. Additionally, prolonged use can lead to carbon buildup on the electrodes, further impairing spark plug performance. The Audi A4, introduced by FAW-Volkswagen, was among the first models to adopt the long-wheelbase and turbo concepts. Available variants include: 1.8T manual base model, automatic base model, comfort model, and technology-leading model; 2.4L comfort model, comfort sports model, and comfort premium model; and 3.0L quattro all-wheel-drive version.