Car Model Guide/ Mercedes-Benz/ C-Class/ W205/ C 200

C 200 M274

The facelift E200/E250 petrol. A modern 2.0 turbo four that replaced the older M271 EVO. Refined and reasonably trouble-free; like any direct-injection engine it will accumulate intake carbon over time.

Overview

The C 200 is the M274 petrol version of the Mercedes-Benz C-Class sedan (W205), sold 2014–2018 with 184 PS and manual or automatic. Demands diligence at level 3. Camshaft adjuster magnets leak oil into the wiring, which can reach the engine control unit if ignored. 3 failure modes are recorded against its engine, gearbox, chassis and shared components. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

Mercedes-Benz C-Class sedan (W205) · photo 0 Mercedes-Benz W205 (2018) 1 by Benespit · CC BY-SA 4.0 · Wikimedia Commons

Power184 PS

Torque300 Nm

Years2014–2018

Fuelpetrol

DriveRWD

EnginesM274

Biggest risks

Ranked by probability × repair cost. 3 recorded in total.

67Solid

Camshaft adjuster magnet oil leak€250–€2,500checkable
Carbon buildup on intake valves€400–€700not checkable
7G-Tronic conductor plate and 13-pin connector leak (722.9)€400–€900partly checkable

Risk level −22 · Likely spend vs price −11 · all issues →

System by system9 systems reviewed · 6 with no recurring fault reported

Engine✓ clearNo recurring fault reported for this system on this engine.

Fuel system✓ clearNo recurring fault reported for this system on this engine.

Intake & airwatchCarbon buildup on intake valves, €400–€700.

Cooling✓ clearNo recurring fault reported for this system on this engine.

Emissions✓ clearNo recurring fault reported for this system on this engine.

Transmissionwatch7G-Tronic conductor plate and 13-pin connector leak (722.9), €400–€900.

Electrics⚠ attentionCamshaft adjuster magnet oil leak, €250–€2,500.

Suspension & brakes✓ clearNo recurring fault reported for this system on this engine.

Body & interior✓ clearNo recurring fault reported for this system on this engine.

Pre-facelift or facelift, this engine spans both

The same badge either side of the changeover. Bands are split at the facelift year from the generation record.

Phase	Years	Low	Average	High	Good buy	What differs
pre Pre-facelift	2014–2017	€10,500	€14,500	€20,500	€12,500	The specification the car launched with.
LCI Facelift (LCI)	2018	€11,450	€15,800	€22,350	€13,650	OM654 and M264 engines replaced OM651 and M274; Revised lights and bumpers; Digital instruments available

Known issues, ranked by expected cost

Faults recorded against this engine, its components and its chassis, ranked by likelihood × repair cost. Costs are indicative ranges with a stated labour basis.

Camshaft adjuster magnet oil leakM274 2.0 turbo€250–€2,500

Oil around the connectors on the front of the engine, a camshaft timing fault code, and in later stages erratic running or electrical faults as oil travels along the harness. The camshaft adjuster solenoids, which Mercedes calls magnets, let oil seep past their seals and along the inside of their connectors. Left alone, the oil wicks through the wiring loom and can reach the engine control unit.

Check: Unplug or inspect the connectors on the camshaft magnets at the front of the engine and look for oil inside them. Ask whether the magnets have been replaced, because catching it early is cheap.

ElectricalcommonDetectable at viewingevidence: documented60–150k km

Carbon buildup on intake valvesdirect injection€400–€700

Rough cold idle, slow throttle response, misfires, gradual loss of low-end response. Direct injection puts no fuel over the intake valves, so crankcase vapour deposits bake on undisturbed.

Check: Not visible without a borescope. Treat it as a service item that's due unless there's a receipt. It's not a fault, it's an unbudgeted maintenance cost.

Turbo & intakeuniversalNot detectable at viewingevidence: documented80–120k km

7G-Tronic conductor plate and 13-pin connector leak (722.9)Mercedes 7G-Tronic seven-speed automatic (722.9)€400–€900

Harsh, delayed or jerky shifts, holding a gear then banging the next in, and limp mode, often with speed-sensor or gear-ratio fault codes. The speed sensors in the conductor plate (mechatronic) fail, and/or the external 13-pin connector leaks fluid that wicks up the wiring into the control unit. Early units are the most affected.

Check: Test-drive through every gear cold and warm. Scan the transmission, and pull the external 13-pin plug to check for fluid on the pins.

TransmissioncommonPartly detectableevidence: documented120–220k km

Ranked by probability × repair cost, not by how loudly a failure is discussed. Inherited from the engine, gearbox, chassis and shared components, each written once.

Pre-purchase inspection

The same issue records, reordered into the sequence you can actually check them in: cold start, static, drive, paperwork.

3 checks · saved in this browser ·

1Static checksEngine off, ideally on a lift.

Camshaft adjuster magnet oil leakUnplug or inspect the connectors on the camshaft magnets at the front of the engine and look for oil inside them. Ask whether the magnets have been replaced, because catching it early is cheap.

2On the driveInclude low-speed manoeuvring, not just an open road.

7G-Tronic conductor plate and 13-pin connector leak (722.9)Test-drive through every gear cold and warm. Scan the transmission, and pull the external 13-pin plug to check for fluid on the pins.

3PaperworkOn these cars the folder is most of the value.

Carbon buildup on intake valvesNot visible without a borescope. Treat it as a service item that's due unless there's a receipt. It's not a fault, it's an unbudgeted maintenance cost.

Mileage and servicing

What the odometer does and doesn't tell you here, plus the service items whose neglect causes the expensive failures above.

The M274 handles mileage well and the fault it's known for arrives on age rather than distance. A car of any mileage can have it, so look rather than assume.

Service item	Interval	Cost
Engine oil and filter Chain and adjuster health depend on clean oil.	15,000 km or annually	€130–200
Camshaft magnet inspection An early leak costs a pair of magnets; a late one costs a wiring loom and more.	at every service	€0–80 to inspect

What to pay

What this engine sells for, against the median of every engine in the chassis. All figures are illustrative placeholders. See the basis chips.

median €15.2k

€10.5k€12.5k€22.4k

Cheapfind the reasonGood buyif it checks outFairnormal moneyOverpricedneeds justifying

Asking price (€)Mileage (km)

Enter an asking price to get a verdict against this variant's band: cheap, fair, good buy or overpriced.

United States vs Europe

1 EUR = 1.08 USD · 2026-07

🇪🇺 Europe · EUR€12,500band €10,500–€22,350

🇺🇸 United StatesNot soldC 200 M274 was never a US-market car

What that meansNo US band exists to compare. Any car you find there's a private import, parts and specialist knowledge are thinner, and the price says more about import cost than about the market.

US figures are the EU band converted at a stated rate. No US market differential is modelled: we hold no sourced US asking prices, and inventing one would be worse than saying so. What the comparison does show for real is availability. Most of this range was never sold in the US.

ModelMercedes-Benz C-Class C 200
ChassisW205
EngineM274
Years2014–2018
MarketCentral EU
Windowrolling 12 months to 2026-07

Good buy at or under the marker · Median asking price · bar spans the 10th to 90th percentile · dashed line is the w205 median, all 2 engines

Good buy isn't the same as cheapest. The good-buy figure assumes the known failure items are either done with receipts or verifiably not yet due. Full breakdown by facelift phase →

Buyer notes

Our judgement, kept separate from the records it's built on.

Our read, not a record

A turbocharged petrol four suits this car's refinement well and avoids the diesel's filter entirely. The camshaft adjuster magnets on the front of the engine can let oil wick along their connectors into the harness, and left long enough it reaches the control unit. Look at the connectors on the timing cover for oil and ask whether the magnets have been replaced. So take this over the diesel if your journeys are short, because it's the simpler car to own that way.

Everything above this line comes from the issue and specification records. This paragraph is our judgement on top of them. See how we reach it.

Full specification

Manufacturer figures for this engine and body, as recorded in the variant and engine data.

Engine code	M274 2.0 turbo
Configuration	I4, turbocharged · 1991 cc
Fuel / injection	petrol · direct
Model years	2014–2018
Facelift phase	Sold either side of the 2018 facelift, 2014–2017 pre, 2018 LCI
Power / torque	184 PS · 300 Nm
Transmissions	6-speed manual · 7-speed automatic (7G-Tronic) · 9-speed automatic (9G-Tronic)
Gearbox families	Mercedes 7G-Tronic seven-speed automatic (722.9) · Mercedes 9G-Tronic nine-speed automatic (725.0)
Drivetrain	RWD
Economy (real-world)	6–7.5 l/100 km mixed
Markets	EU