What is the reason for the Scirocco not shifting to 2nd gear?

[AlexaDella]

DSG transmission will inevitably have some jerking when shifting from 1st to 2nd gear. Engine performance decline: When the car's engine performance significantly declines, it is often accompanied by increased fuel consumption. This is likely caused by prolonged failure to replace engine oil, oil filter, air filter, and fuel filter, resulting in incomplete fuel combustion and increased engine carbon deposits. Excessive carbon buildup will increase fuel consumption, as carbon deposits accumulate around the valve chamber, sludge builds up, and noise becomes particularly loud. This leads to increased internal engine carbon deposits, affecting engine performance. Therefore, carbon removal is necessary. Prolonged idling: Leaving the car running without turning off the engine for extended periods consumes a significant amount of fuel, especially when idling with the air conditioning on during summer while waiting. Besides driving the water pump, oil pump, flywheel, and transmission input shaft gears, the engine also needs to maintain the operation of the air conditioning compressor. When the air conditioning is clogged, it consumes even more fuel, and the air expelled from the vents can also have adverse effects on health.