The Mercedes-Benz CL C216 is one of the most prestigious grand tourers ever produced by Stuttgart. Built on the W221 S-Class platform, it combines coupe elegance with full-size luxury, offering a dramatic two-door body style and a cabin that rivals any car in its segment.
Sold between 2006 and 2014, the C216 replaced the outgoing CL C215 and represented a significant leap forward in technology, refinement, and engine variety. It arrived with Active Body Control suspension, AIRMATIC air suspension, and a suite of driver assistance systems that were genuinely cutting-edge at launch.
Today, the C216 occupies a unique position in the used market: it delivers near-supercar performance and S-Class comfort at a fraction of its original sticker price. However, that low entry cost comes with a catch — complex systems, expensive parts, and specific reliability concerns that any prospective buyer must understand before committing. This guide covers everything you need to know.
Parts & Accessories
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The C216 entered production in 2006 as a 2007 model year vehicle and ran until 2014. It shared its architecture directly with the W221 S-Class, giving it access to a wide range of powertrains including naturally aspirated V8s, twin-turbocharged V12s, and a high-revving AMG V8.
A mild facelift arrived in 2010, bringing revised front and rear styling, updated COMAND infotainment, and minor suspension refinements. The CL 63 AMG and CL 65 AMG remained halo variants throughout the production run, targeting buyers who wanted outright performance alongside grand touring comfort.
| Engine | Displacement | Power | Torque | 0-60 mph | Notes |
|---|---|---|---|---|---|
| CL 500 — M273 | 5.5L V8 | 382 hp | 391 lb-ft | 5.0 sec | Naturally aspirated, most common variant |
| CL 550 — M273 | 5.5L V8 | 382 hp | 391 lb-ft | 5.0 sec | US-market designation for CL 500 |
| CL 600 — M275 | 5.5L V12 Biturbo | 510 hp | 612 lb-ft | 4.5 sec | Complex, high-maintenance flagship |
| CL 63 AMG — M156 | 6.2L V8 NA | 525 hp | 465 lb-ft | 4.5 sec | High-revving AMG unit, no turbo |
| CL 65 AMG — M275 | 6.0L V12 Biturbo | 604 hp | 738 lb-ft | 4.4 sec | Most powerful and most expensive to run |
How to check a used Mercedes-Benz CL C216's history
Before buying a used Mercedes-Benz CL C216, it is essential to ensure full transparency about its past. Undisclosed accidents can hide poor-quality repairs that directly compromise the safety of the driver and passengers.
A vehicle as complex as the C216 carries specific risks that are invisible to the naked eye. Misaligned bodywork panels are notoriously difficult to detect on this model due to its wide quarter panels and flush door gaps. More critically, unreplaced airbags or improperly reset ABC suspension control units after an impact can create genuine safety hazards. A hastily repaired AIRMATIC strut or front subframe following a collision may show no visible damage but will fail unpredictably. It is therefore strongly recommended to check the vehicle's complete history using its license plate or VIN number before making any purchase decision.
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Key Strengths
The CL C216 offers a compelling ownership proposition for buyers who do their homework.
The cabin quality is outstanding — hand-stitched leather, genuine wood trim, and ergonomically excellent seats make long-distance travel genuinely effortless. The Active Body Control (ABC) suspension system delivers a ride quality that few cars at any price can match when it is functioning correctly.
The M156 6.2L V8 fitted to the CL 63 AMG is widely regarded as one of the most characterful and durable AMG engines ever built, with strong longevity when properly maintained. The naturally aspirated design also means fewer boost-related failure points compared to turbocharged variants.
Parts availability is strong thanks to shared components with the W221 S-Class, and a healthy independent specialist network exists in the US. For buyers seeking a used ultra-luxury coupe, the C216 remains one of the most rewarding choices — provided a thorough pre-purchase inspection is conducted.
Known Reliability Issues
CL 500 / CL 550 — M273
The M273 5.5L V8 is generally the most straightforward engine in the C216 lineup, but it is not without its quirks.
Balance shaft sprocket wear is the most critical issue on this engine. The plastic sprocket can strip its teeth, leading to timing chain rattle at startup and, in severe cases, complete engine failure. This typically appears between 60,000 and 100,000 miles and should be considered a critical repair on any high-mileage example. For a detailed breakdown of this engine's characteristics, see our Mercedes-Benz M273 Engine Guide.
Camshaft adjuster solenoid failure is another common problem, causing rough idle and fault codes. Severity: Moderate. Typical mileage: 70,000–120,000 miles.
Oil leaks from the valve cover gaskets and rear main seal are common on higher-mileage units. Severity: Minor to Moderate depending on extent.
CL 600 / CL 65 AMG — M275
The M275 V12 Biturbo is an engineering masterpiece, but it demands respect and a well-funded maintenance budget.
Timing chain guide wear is a well-documented critical issue. The plastic guides degrade over time, generating metal debris and threatening catastrophic engine damage. This can begin as early as 60,000 miles and is considered Critical severity.
Turbocharger oil line failures are common on both the CL 600 and CL 65 AMG. Hardened seals allow oil to leak onto hot components, creating a fire risk. Severity: Critical. Appears from 50,000–80,000 miles.
ABC hydraulic pump failure is particularly common on V12 models, which are heavier on the system. The pump can fail silently before causing the car to sag. Severity: Moderate to Critical. Typical mileage: 60,000–100,000 miles.
CL 63 AMG — M156
The M156 6.2L naturally aspirated V8 is celebrated for its durability relative to AMG's turbocharged successors, but it has one well-known Achilles heel.
Camshaft wear is the defining issue of the M156. The camshaft lobes and follower surfaces can wear prematurely, especially if oil changes are delayed. This causes ticking noises and loss of power. Severity: Critical. Typical mileage: 60,000–100,000 miles. Strict 5,000-mile oil change intervals using approved low-viscosity oil are essential. For a full overview, consult our Mercedes-Benz M156 Engine Guide.
Spark plug tube seal leaks allow oil into the spark plug wells, causing misfires. Severity: Moderate. Typical mileage: 80,000–120,000 miles.
Throttle actuator failure can cause reduced power or limp mode activation. Severity: Moderate. Appears from 70,000 miles onward.
Head Bolt Failure (Early M156 AMG Engines) — Early-production M156 engines fitted to some CL 63 AMG models can suffer from defective cylinder head bolts that corrode and stretch over time, potentially leading to coolant loss and head gasket failure. This issue primarily affects engines produced before mid-2011 and should be verified through engine serial number records or evidence of updated head bolts having been installed.
Chassis Issues
ABC (Active Body Control) suspension failure is the single most expensive and common chassis problem across all C216 variants. The hydraulic system relies on a network of pumps, accumulators, lines, and struts. Accumulators typically fail between 60,000 and 80,000 miles, causing the car to sit noticeably lower on one corner.
Hydraulic line cracking is equally common. Aged rubber lines develop pinhole leaks, resulting in fluid loss and suspension drop. Full hydraulic system service can cost $3,000–$8,000 depending on the extent of the repair.
Front control arm bushings wear progressively and are typically due for replacement around 80,000–100,000 miles. Symptoms include vague steering and light clunking over bumps.
Electronics and Software
COMAND infotainment system failures are common across the C216 lifespan. Units can freeze, lose navigation function, or refuse to read media. Severity: Minor but frustrating.
Instrument cluster pixel failure occurs on earlier C216 units, causing sections of the display to go dark. This is a known shared issue with the W221 platform. Severity: Minor. Typical appearance: 80,000–120,000 miles.
Sunroof drainage blockages are not electrical per se, but blocked drainage tubes cause water ingress that shorts out modules beneath the dashboard and in the trunk. This can trigger multiple fault codes simultaneously and is disproportionately expensive to diagnose and repair.
Rear SAM (Signal Acquisition Module) faults are frequently triggered by the water ingress described above. Severity: Moderate to Critical depending on the extent of damage.
Maintenance and Servicing
The CL C216 follows Mercedes-Benz's ASSYST service indicator, which calculates service intervals based on driving conditions. However, for any used example, sticking to a fixed 10,000-mile interval for oil changes is strongly recommended.
Engine oil should be changed every 5,000–7,500 miles on the M156 AMG unit specifically. Use only MB 229.5 or 229.51 approved synthetic oil — non-approved oils accelerate camshaft wear dramatically.
ABC fluid (hydraulic oil) should be inspected annually and replaced every 60,000 miles or if the system develops any leaks. Delay here is the most common cause of catastrophic suspension repair bills.
Spark plugs are due at roughly 60,000-mile intervals on all variants. On the V12 models, spark plug access is labor-intensive and accounts for a significant share of the cost.
Transmission service on the 7G-Tronic gearbox should be performed every 60,000 miles, despite Mercedes' "lifetime fluid" designation — a claim that rarely holds up on high-mileage luxury vehicles.
Typical annual service costs at an independent specialist range from $800 to $1,500 for a standard service. Budget $2,000–$5,000 per year for a comprehensive ownership experience including wear item replacements.
Parts to Watch / Replace First
ABC accumulators — These hydraulic components are the first to fail on the suspension system and are best replaced proactively. Replacing all four at once saves significant labor costs.
Timing chain tensioners and guides — On V8 and V12 engines alike, aged plastic guides are a known failure point. Inspect or replace preventively on any example above 60,000 miles.
Camshaft adjuster solenoids — A relatively affordable fix that prevents larger timing-related issues on M273-equipped cars.
ABC hydraulic pump — A weakening pump puts stress on the entire system. Listen for whining noises under load as an early warning sign.
Valve cover gaskets — Common oil leak source on all engine variants, particularly on high-mileage examples.
Sunroof drain tubes — Clearing or replacing these prevents the water ingress that destroys expensive electronic modules.
Spark plug tube seals — Prevents oil contamination in plug wells, especially important on the M156.
Front control arm bushings — Essential for steering precision and should be inspected on any car with more than 80,000 miles.
7G-Tronic transmission fluid and filter — Often neglected, a fresh transmission service dramatically improves shift quality on older units.
FAQ
Is the Mercedes-Benz CL C216 reliable?
The CL C216 is conditionally reliable — cars that have been properly maintained with documented service history can be very dependable. However, deferred maintenance on the ABC suspension system, timing components, and engine internals leads to exponentially expensive repair bills. It is not the right car for a buyer who wants to minimize ownership costs.
What is the best engine option in the CL C216?
For the balance of performance, durability, and running costs, the CL 63 AMG with the M156 is widely considered the best option. It avoids the turbocharger complexity of the V12 variants while delivering exceptional performance. The M273-powered CL 550 is the most practical everyday choice, provided the balance shaft issue has been addressed.
How many miles will a Mercedes-Benz CL C216 last?
A well-maintained C216 can reach 150,000–200,000 miles with confidence. Engine longevity is generally strong on all variants. The limiting factor is almost always the ABC suspension system and associated electronics, not the drivetrain itself.
Is the Mercedes-Benz CL C216 expensive to maintain?
Yes, significantly so compared to most used vehicles. Annual maintenance costs at an independent specialist typically run $1,500–$3,000, and a single ABC suspension overhaul can reach $5,000–$10,000. The C216 rewards owners who budget proactively and address issues early rather than waiting for failures.
What should I check when buying a used CL C216?
Prioritize a full inspection of the ABC suspension for leaks, sagging, and pump noise. Verify oil change history on the M156 or check for camshaft wear signs with a compression or bore scope test. Check for water stains in the trunk and footwells indicating sunroof drain issues. Run a full VIN history check and request a pre-purchase inspection from a Mercedes specialist.
Which CL C216 model years are best to buy?
Post-facelift 2010–2014 models are generally preferable, benefiting from updated electronics and a longer service history to review. Any year is acceptable provided the ABC system and engine are in good condition — model year matters far less than documented maintenance.
Conclusion
The Mercedes-Benz CL C216 earns a reliability score of 6/10 for used buyers. It is a breathtaking grand tourer with genuinely impressive engineering, but it demands an informed, proactive owner willing to invest in preventive maintenance. The rewards are exceptional — no other car at this price delivers this combination of presence, comfort, and performance. Buy with a full inspection, a clean VIN report, and a realistic maintenance budget, and the C216 will be one of the most satisfying vehicles you have ever owned.