Is the timing mechanism in the 2014 Audi A6 a belt or a chain system?

In the 2014 Audi A6, most models come equipped with a manufacturer-specified timing chain, except for the 2.0 TFSI engine which utilizes a toothed belt. While the timing chain is designed to last the lifetime of the vehicle, issues may arise due to normal wear and tear or a faulty timing chain tensioner. When these problems occur, the timing chain may become stretched or distorted, leading to erratic driving behavior, pauses, or potential stalling. Additionally, a slapping noise may be heard upon initial engine startup before it reaches operating temperature, which can sometimes be mistaken for lifter ticking. The typical cost of replacing the timing chain ranges between $250 and $300, but this can vary based on the labor required to remove and install the components.