The 2018 Mercedes-Benz S-Class is a full-size luxury sedan built to deliver flagship comfort, quietness, and cutting-edge tech. It’s ideal for buyers who want an executive-grade daily driver, a long-distance cruiser, or a chauffeured-style experience with top-tier materials and advanced driver aids. For 2018, it continues the W222 generation and benefits from the mid-cycle update introduced for 2018, bringing refreshed styling, updated infotainment, and revised powertrains. In the luxury sedan market, it sits at the top end, competing with the BMW 7 Series, Audi A8, and Lexus LS.

1) Engine lineup with serious range: The 2018 S-Class offers multiple powertrains, including the S 450 with a 3.0L twin-turbo V6, the S 560 with a 4.0L twin-turbo V8, the S 63 AMG with a 4.0L twin-turbo V8, and the S 65 AMG with a 6.0L twin-turbo V12. Many models are available with 4MATIC all-wheel drive for improved traction in bad weather. 2) AIRMATIC air suspension comfort: AIRMATIC is a hallmark S-Class feature, delivering a smooth ride and the ability to adapt to road conditions. It’s a major reason this sedan feels so composed at speed and so plush around town. 3) Advanced safety and driver assistance: Available driver-assist systems include adaptive cruise control, lane keeping assistance, blind spot monitoring, and automated emergency braking, giving the S-Class a strong safety-tech profile for its era. 4) Luxury interior and long-distance refinement: Expect high-end leather, real wood or metal trim, heated/ventilated/massaging seat options, and impressive cabin isolation. Rear-seat comfort is a standout for buyers who prioritize passenger space. 5) Updated tech for 2018: The 2018 refresh brought updated displays and interface features, keeping the S-Class competitive for infotainment, navigation, and smartphone integration (equipment varies by trim and options).

Searches like “2018 Mercedes-Benz S-Class reliability” and “2018 Mercedes-Benz S-Class common issues” often come down to understanding that this is a complex flagship sedan: it can be reliable when maintained correctly, but repairs can be expensive when something does go wrong. Commonly reported concerns include: 1) Air suspension wear (AIRMATIC): Owners report air struts, air springs, or the compressor wearing over time, sometimes showing up as a sagging corner overnight, a “vehicle rising slowly” symptom, or suspension warning messages. Issues can appear around 60,000–100,000 miles depending on climate and road conditions. 2) Oil leaks and seepage: Some owners report oil seepage from gaskets/seals as mileage climbs, with valve cover areas and related seals being common culprits on turbocharged engines. Leaks may become noticeable around 50,000–90,000 miles, especially if service intervals are stretched. 3) Electrical/infotainment glitches: The S-Class is packed with modules, sensors, and convenience features, so occasional complaints involve screen freezing, camera/sensor errors, or intermittent warnings. These can be as simple as software updates or battery/voltage sensitivity, but diagnosing can take time. 4) Brake and tire costs (wear items): While not a “failure,” owners frequently mention higher-than-average brake and tire replacement costs due to the vehicle’s weight, performance, and wheel/tire sizing. Expect faster wear if driven aggressively or on rough pavement.