At the bottom of the ranking sits the BMW M5 (E39, 1998–2003), one of the brand’s last models defined by straightforward engineering and notable toughness—an approach that tends to age especially well.

It is followed by the Mercedes-Benz SL-Class AMG (R129, 1989–2001) with a naturally aspirated 7.3-liter V12, still regarded as one of the most reliable powerplants in the company’s history; that big-displacement unit’s reputation for longevity is well earned.

The fifth-generation Volkswagen Golf (2004–2009) with a naturally aspirated 3.2-liter V6 also proved impressively dependable. According to experts, these engines proved exceptionally reliable.

High marks went to the BMW M3 (E46, 2000–2006) and the Porsche Boxster S (987, 2004–2012)—cars that manage to combine genuine sports-car character with long-term durability.

The top three featured the Porsche 911 Carrera (997, 2005–2012) and the second-generation Audi TT (8J, 2008–2015). Both stand out for reliable naturally aspirated and turbocharged engines, as well as strong resistance to wear when maintained on schedule; routine service pays dividends here.

Leading the list is the Mercedes-Benz E-Class W124 (1984–1995). Experts described it as the engineering benchmark of its era, and the versions with inline-six engines built before 1993 were recognized as the most reliable among German cars of recent decades. Few models make a clearer case for meticulous, no-nonsense engineering.

Specialists also stress that the lifespan of German cars directly depends on proper care and timely replacement of consumables. With careful use, many can serve for decades—something borne out by the immense mileages some examples have accumulated. The takeaway is simple: look after them, and they tend to look after you.