"Is the S Serisi S320 reliable, and what should you check?"
When buying a used Mercedes-Benz S-Class S320 2016 (217 / 222), the most frequently mentioned issue is carbon buildup on intake valves. Also, oil leaks from the front timing covers are commonly reported.
Engine: M276
M276 · turbo petrol · S320 · Used in this car from 2014-2017
Known engine issues
Timing chain tensioners are the most problematicThe most problematic part of this engine is the timing chain tensioners. If their failure is missed, the entire timing set with camshaft adjusters will need replacement.
Camshaft pulse discs may shiftOn these engines, the pulse discs on the camshafts often shift out of position.
Direct injection injectors are fuel-quality sensitiveThe direct injection injectors are sensitive to fuel quality.
+1 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
Carbon buildup on intake valves
Often reported
The M276 engine uses direct injection and is prone to carbon buildup on intake valves, especially with city driving and high mileage.
Engine Internal
Oil leaks from front timing covers
Often reported
On the V6 M276 engine, oil leaks from the front timing covers and gaskets can cause noticeable oil consumption, oil spots under the vehicle, and dangerously low oil levels if neglected.
Engine Internal
Timing chain tensioner and pulleys: rattling and faulty regulators
Often reported
The M276 engine in the S-Class W222 is known for chain rattling noises, especially when cold, and issues with the timing chain tensioner and camshaft actuators. Symptoms include loud startup noise, temporary timing deviation, or warning lights.
Timing chain
Mercedes-Benz S Serisi S320 technical specs
Mercedes-Benz S Serisi S320 (2016): fuel use 8 l/100 km; 0–100 in 7.1 s.
What should I look for when buying a Mercedes-Benz S-Class S320?+
When buying a 2016 S320, check the service history, test drive, and look for engine/transmission warnings. Most commonly reported issues: carbon buildup on intake valves; oil leaks from front timing covers; timing chain tensioner and pulleys: rattling and faulty regulators.
What are the chronic problems of the Mercedes-Benz S-Class S320?+
Most commonly reported issues: carbon buildup on intake valves; oil leaks from front timing covers; timing chain tensioner and pulleys: rattling and faulty regulators.
Is the Mercedes-Benz S-Class S320 reliable?+
Rather than a simple yes/no, it's best to weigh the proven pros and cons together. This page lists 3 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from Difetti fault database records; the source vehicle and target vehicle are verified for brand, fuel, engine, and generation compatibility. Topics with insufficient evidence are not shown.