Active Body Control hydraulics on the W220, Airmatic wear and M273 idler-gear wear on early W221 S 550s, and M278/M157 timing-chain stretch on 2011–2013 cars are the best-documented S-Class issues. The W222 and W223 show mainly recalls, including S 560 oil plugs, S 580 Camtronic software and front brake hoses. 7 documented issues, 4 with NHTSA recall numbers.
CarWhere lists 7 documented S-Class issues, including 4 NHTSA safety recalls, each with affected years, engines, symptoms, pre-purchase checks and a source.
S-Class generations at a glance
Mercedes-Benz S-Class chassis codes and the known issues listed for each
Active Body Control high-pressure hose corrosion (2000–2004)
Safety recall
Chassis:
W220 (S 430, S 500, S 600, S 55/S 65 AMG with ABC)
Years:
2000–2004
Engine:
ABC-equipped cars
Active Body Control is Mercedes' hydraulic suspension, with a high-pressure pump, accumulators and a servo strut at each wheel. On the W220 S-Class and C215 CL, the steel inner layer of the ABC high-pressure distribution hose could corrode from humidity and eventually leak hydraulic fluid. A 2004 recall (04V-228) covered V12 cars, and the 2007 campaign extended it to about 20,000 2000–2004 S-Class and CL models. Dealers fit a corrosion-resistant hose. Outside the recall, ABC needs regular hydraulic fluid and filter changes to stay healthy.
Symptoms
ABC warning message
Hydraulic fluid leak near the front of the car
Car sinking or riding harshly
Check before buying
Confirm 07V-263 (and 04V-228 for V12 cars) completion
Airmatic air strut, valve block and compressor leaks (2007–2013)
Moderate
Chassis:
W221 (S 550, S 63 AMG and other Airmatic cars)
Years:
2007–2013
Engine:
Airmatic-equipped cars (non-ABC)
Most W221 S-Class models other than ABC-equipped V12s ride on Airmatic air suspension. With age, the struts' air bladders and top seals leak, and the valve block mounted above the compressor is another common leak point. An undetected leak makes the compressor run longer than designed until it overheats or wears out. Owners typically see one corner settle overnight and an air-suspension warning. Fixing the leak first and then judging the compressor's condition is the usual repair approach. This is a documented wear pattern, not a recall.
Symptoms
Car leaning or low at one corner after parking
Air suspension malfunction warning
Compressor running constantly
Check before buying
Check ride height after the car has sat for several hours
Scan for Airmatic leak or compressor runtime faults
Early M273 V8 engines, used in the first W221 S 550s as well as other 2006–2007 Mercedes V8 models, can suffer premature wear of the timing-drive idler gear sprocket. Worn teeth upset cam timing, leading to correlation faults and eventually a running problem. Exposure depends on the engine serial number, with engines up to 2739..30 088611 affected. The 2015 Seifi v. Mercedes-Benz USA settlement extended coverage to 10 years/125,000 miles, which has now expired for nearly all cars, so any remaining repair is at the owner's expense. The fix replaces the idler gear and timing components.
Symptoms
Check-engine light with camshaft correlation codes
On early twin-turbo V8s, oil could drain from the cylinder heads while the car was parked. At the next start the timing-chain tensioner was briefly short of oil, and repeated over time this stretched the chains. Reports concentrate on 2011–2012 M157 AMG engines, and the related M278 used in the S 550 shows similar cold-start rattle. Mercedes' service fix adds oil check valves, and revised tensioners and guides were fitted to 2013-on engines. There was no recall, so out-of-warranty repairs are paid by the owner.
Symptoms
Rattle at cold start
Long crank before starting
Misfires, power loss, check-engine light
Check before buying
Listen to a cold start
Scan for camshaft correlation codes
Ask whether the timing chains, tensioners or check valves were replaced
Engine oil plugs may leak under high load (S 560) (2018–2019)
Safety recall
Chassis:
W222 (S 560, Maybach S 560)
Years:
2018–2019
Engine:
M176 4.0L twin-turbo V8
About 9,800 2018–2019 S 560 and Maybach S 560 sedans with the 4.0-liter twin-turbo V8 were recalled because two engine oil plugs might not hold up under high engine load. A plug that loosens or fails can leak oil, which raises fire risk if oil reaches hot exhaust parts and can damage the engine if oil level drops. Dealers add a retaining plate to reinforce the plugs. The fix is quick, so for buyers the main check is confirming it was done.
Camtronic failure response may overheat or stall the engine (S 580) (2021–2023)
Safety recall
Chassis:
W223 (S 580, Maybach S 580)
Years:
2021–2023
Engine:
M176 4.0L twin-turbo V8 with 48V
About 27,000 2021–2023 S 580 and Maybach S 580 sedans were recalled because, if the engine's Camtronic variable valve lift mechanism fails mechanically, the engine control software could respond in a way that overheats or stalls the engine. Dealers update the engine control unit software. A separate 2021 recall (21V-843) also updated ECU software on 2021 S 580s after a fault that could stall the engine without a restart. Buyers should check the VIN for both.
About 20,000 2021–2023 S-Class sedans, including Maybach and plug-in hybrid S 580e versions, were recalled because the front brake hoses could rupture and leak brake fluid, which reduces braking performance. Dealers replace the front brake hoses. A later 2026 campaign (26V-638) also covers brake hoses on 2022–2025 S-Class 4MATIC models, so the VIN should be checked against both. A leaking hose can show up as a soft pedal or a brake fluid warning before it fails completely.
This page explains specific mechanical issues and recalls. Which model years drew the most owner complaints is a different question, answered in the years-to-avoid research from NHTSA complaint and service-bulletin counts.
Confirm exactly how a S-Class was built before you buy.
Engine, transmission and factory options decide which of these issues apply. The data card records how a Mercedes-Benz S-Class was built — option codes, paint, upholstery and equipment; CarWhere decodes it from the VIN, free availability check, $9.99 only if build data exists for that car.
What are the most common Mercedes-Benz S-Class problems?
The best-documented Mercedes-Benz S-Class issues are Airmatic air strut, valve block and compressor leaks (W221, 2007–2013), M273 V8 idler gear sprocket wear (W221, 2007) and M278 / M157 twin-turbo V8 timing chain stretch (W221, 2011–2013). How much each matters depends on the chassis code and engine, so check the section for the exact car you are looking at.
Which S-Class years are affected by M273 V8 idler gear sprocket wear?
M273 V8 idler gear sprocket wear applies to W221 cars (2007, M273 5.5L V8). Early M273 V8 engines, used in the first W221 S 550s as well as other 2006–2007 Mercedes V8 models, can suffer premature wear of the timing-drive idler gear sprocket.
Has the Mercedes-Benz S-Class had any safety recalls?
Yes. Recalls covered on this page include Active Body Control high-pressure hose corrosion (NHTSA 07V-263), engine oil plugs may leak under high load (S 560) (NHTSA 20V-173), Camtronic failure response may overheat or stall the engine (S 580) (NHTSA 24V-704) and front brake hoses may rupture (NHTSA 25V-116). Recall repairs are free at a Mercedes-Benz dealer; check any specific car’s VIN with NHTSA to see whether its recall work was completed.
What should I check before buying a used Mercedes-Benz S-Class?
Check ride height after the car has sat for several hours. Read the engine serial number. Listen to a cold start. A pre-purchase inspection by a Mercedes-Benz specialist covers these and pulls the service history.
Is the Mercedes-Benz S-Class reliable?
Most well-known Mercedes-Benz S-Class problems are tied to specific chassis codes or engines rather than the model as a whole, and many have a known fix or updated part.
Sources
Issue descriptions are CarWhere’s own summaries of the sources below. Chassis codes covered: W220 (2000–2006 (W220 sedan, C215 CL)), W221 (2007–2013 (W221 sedan, C216 CL)), W222 (2014–2020 (W222 sedan, C217/A217 coupe and cabriolet)), W223 (2021–present (W223)). Repair costs are shown only where a source states them and vary by shop and region.
Independent reference compiled by CarWhere — not affiliated with or endorsed by Mercedes-Benz Group AG or Mercedes-Benz USA. Mercedes-Benz, AMG, Maybach and the model names are trademarks of their owner.