Mercedes-Benz C-Klasse W205
Weaknesses, engine ratings and buying advice
457–525 PS
6.2L V8 AMG Benzin
Last Naturally Aspirated AMG — 457 hp V8 in C-Class Format
Legendary!457–525 PS
6.2L V8 AMG Benzin
10 weaknesses
Stay Away!Body Variants
The Mercedes-Benz C-Klasse W205 is available as Limousine and T-Modell — choose your body type for specific insurance data:
Generations
Engine Overview
The Mercedes-Benz C-Klasse W205 is available with 27 engine variants — from 90 to 612 hp. 3 variants had engine changes — the model year is crucial.
The Mercedes-Benz C 180d (Diesel, 116–122 PS) comes with 5 different engines: OM651DE18 (2014–2018, Be Careful) und OM651DE18 (2014–2018, Be Careful) und OM651DE22 (2014–2018, Stay Away!) und OM608 (2018–2021, Be Careful) und OM608 (2018–2021, Be Careful). Pay attention to the model year for the C 180d!
The Mercedes-Benz C 200d (Diesel, 136 PS) comes with 2 different engines: OM651DE18 (2014–2017, Be Careful) und OM651DE22 (2014–2018, Stay Away!). Pay attention to the model year for the C 200d!
The Mercedes-Benz C 220d (Diesel, 163–200 PS) comes with 4 different engines: OM651DE22 (2014–2018, Stay Away!) und OM651DE22 (2014–2018, Stay Away!) und OM654 (2018–2021, Be Careful) und OM654 (2018–2021, Be Careful). Pay attention to the model year for the C 220d!
The Mercedes-Benz C 250d (Diesel, 204 PS) has the OM651DE22 (2.1L Diesel) — rated: "Stay Away!", 6 known weaknesses.
The Mercedes-Benz C 300d (Diesel, 245 PS) has the OM654 (2.0L Diesel) — rated: "Be Careful", 11 known weaknesses.
The Mercedes-Benz AMG C 43 (Benziner, 367 PS) has the M276 (3.0-3.5L V6) — rated: "Be Careful", 10 known weaknesses.
The Mercedes-Benz AMG C 43 Cabrio (Benziner, 367 PS) has the M276 (3.0-3.5L V6) — rated: "Be Careful", 10 known weaknesses.
The Mercedes-Benz AMG C 63 (Benziner, 476 PS) has the M177 (4.0L V8 BiTurbo AMG) — rated: "Be Careful", 8 known weaknesses.
The Mercedes-Benz AMG C 63 Cabrio (Benziner, 476 PS) has the M177 (4.0L V8 BiTurbo AMG) — rated: "Be Careful", 8 known weaknesses.
The Mercedes-Benz AMG C 63 S (Benziner, 510 PS) has the M177 (4.0L V8 BiTurbo AMG) — rated: "Be Careful", 8 known weaknesses.
The Mercedes-Benz AMG C 63 S Cabrio (Benziner, 510 PS) has the M177 (4.0L V8 BiTurbo AMG) — rated: "Be Careful", 8 known weaknesses.
The Mercedes-Benz C 160 (Benziner, 129 PS) has the M270DE16 (1.6L Turbo) — rated: "Be Careful", 7 known weaknesses.
The Mercedes-Benz C 160 Cabrio (Benziner, 129 PS) has the M270DE16 (1.6L Turbo) — rated: "Be Careful", 7 known weaknesses.
The Mercedes-Benz C 180 (Benziner, 156 PS) has the M270DE16 (1.6L Turbo) — rated: "Be Careful", 7 known weaknesses.
The Mercedes-Benz C 180 Cabrio (Benziner, 156 PS) has the M270DE16 (1.6L Turbo) — rated: "Be Careful", 7 known weaknesses.
The Mercedes-Benz C 180 Coupé (Benziner, 156 PS) has the M270DE16 (1.6L Turbo) — rated: "Be Careful", 7 known weaknesses.
The Mercedes-Benz C 200 (Benziner, 184 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 200 Cabrio (Benziner, 184 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 200 Coupé (Benziner, 184 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 250 (Benziner, 211 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 300 (Benziner, 245 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 300 Cabrio (Benziner, 245 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 300 Coupé (Benziner, 245 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 400 (Benziner, 333 PS) has the M276 (3.0-3.5L V6) — rated: "Be Careful", 10 known weaknesses.
The Mercedes-Benz C 300 e (Benziner Plug-in-Hybrid, 320 PS) has the M264 (2.0L Turbo EQ Boost) — rated: "Be Careful", 12 known weaknesses.
The Mercedes-Benz C 350e (Benziner Plug-in-Hybrid, 286 PS) has the M274 (1.6-2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 300 de (Diesel Plug-in-Hybrid, 306 PS) has the OM654 (2.0L Diesel) — rated: "Be Careful", 11 known weaknesses.
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Rust on longitudinal members and rear axle subframe Longitudinal members, jack-point attachment holes and rear axle subframe rust through. MB offers goodwill replacement. Symptoms: Visible rust on underbody, MOT advisory on longitudinal members, corroded jacking points from 100,000 km | High |
Top Reported Issues
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Known Problems and Issues
A total of 89 weaknesses have been documented for the Mercedes-Benz C-Klasse W205 (2014–2021) — 80 engine-related and 9 vehicle-related. 2 problem engines: OM651DE22 (2.1L Diesel), M156 (6.2L V8 AMG). Typical issues affect Rust, Suspension, Electronics, Other.
C-Klasse (OM651DE18, 2014–2018) — Be Careful: Piezo Injector Faults (220/250 CDI), Chain Tensioner Failure with Oil Loss, Particulate Filter Blockage with Short-Trip Use. Power: 116–122 PS.
C-Klasse (OM651DE18, 2014–2017) — Be Careful: Piezo Injector Faults (220/250 CDI), Chain Tensioner Failure with Oil Loss, Particulate Filter Blockage with Short-Trip Use. Power: 136 PS.
C-Klasse (OM651DE22, 2014–2018) — Stay Away!: Chain Tensioner Seal Leaking — Recall, Timing Chain Stretch (Simplex Chain), Piezo Injector Faults. Power: 120 PS.
C-Klasse (OM651DE22, 2014–2018) — Stay Away!: Chain Tensioner Seal Leaking — Recall, Timing Chain Stretch (Simplex Chain), Piezo Injector Faults. Power: 136 PS.
C-Klasse (OM651DE22, 2014–2018) — Stay Away!: Chain Tensioner Seal Leaking — Recall, Timing Chain Stretch (Simplex Chain), Piezo Injector Faults. Power: 163–170 PS.
C-Klasse (OM651DE22, 2014–2018) — Stay Away!: Chain Tensioner Seal Leaking — Recall, Timing Chain Stretch (Simplex Chain), Piezo Injector Faults. Power: 204 PS.
C-Klasse (OM608, 2018–2021) — Be Careful: Timing belt maintenance obligation, Timing belt change critical, Increased oil consumption / turbo shaft seal. Power: 116–122 PS.
C-Klasse (OM654, 2018–2021) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 194–200 PS.
C-Klasse (OM654, 2018–2021) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 245 PS.
C-Klasse (M156, 2011–2015) — Stay Away!: Head Bolt Corrosion — Coolant in Combustion Chamber, Camshaft Wear — Cold-Start Lubrication Deficit, Camshaft Adjuster — Locking Plate Wears Out. Power: 457 PS.
C-Klasse (M156, 2011–2015) — Stay Away!: Head Bolt Corrosion — Coolant in Combustion Chamber, Camshaft Wear — Cold-Start Lubrication Deficit, Camshaft Adjuster — Locking Plate Wears Out. Power: 481–487 PS.
C-Klasse (M276, 2011–2015) — Be Careful: Oil cooler leaking in the V-block, Camshaft adjuster leaking — wiring harness contaminated, Piston slap (early 3.5L variants). Power: 306 PS.
C-Klasse (M270DE16, 2014–2018) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 156 PS.
C-Klasse (M274, 2014–2018) — Be Careful: High-Pressure Pump Faulty or Noisy, Camshaft Adjuster Leaks — Oil in Wiring Harness, Electric thermostat failure. Power: 184 PS.
C-Klasse (M274, 2014–2018) — Be Careful: High-Pressure Pump Faulty or Noisy, Camshaft Adjuster Leaks — Oil in Wiring Harness, Electric thermostat failure. Power: 211 PS.
C-Klasse (M276, 2014–2018) — Be Careful: Oil cooler leaking in the V-block, Camshaft adjuster leaking — wiring harness contaminated, Piston slap (early 3.5L variants). Power: 333 PS.
C-Klasse (M270DE16, 2015–2018) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 129 PS.
C-Klasse (M274, 2015–2018) — Be Careful: High-Pressure Pump Faulty or Noisy, Camshaft Adjuster Leaks — Oil in Wiring Harness, Electric thermostat failure. Power: 245 PS.
C-Klasse (M276, 2015–2018) — Be Careful: Oil cooler leaking in the V-block, Camshaft adjuster leaking — wiring harness contaminated, Piston slap (early 3.5L variants). Power: 367 PS.
C-Klasse (M177, 2015–2021) — Be Careful: MCT Gearbox — Clutch Wears in City Traffic, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Camshaft Cover Gasket Leaking — Hot-V Area. Power: 476 PS.
C-Klasse (M177, 2015–2021) — Be Careful: MCT Gearbox — Clutch Wears in City Traffic, Camshaft Adjuster Solenoid Draws Oil into Wiring Harness, Camshaft Cover Gasket Leaking — Hot-V Area. Power: 510 PS.
C-Klasse (M274, 2015–2018) — Be Careful: High-Pressure Pump Faulty or Noisy, Camshaft Adjuster Leaks — Oil in Wiring Harness, Electric thermostat failure. Power: 211 PS.
C-Klasse (M264, 2019–2021) — Be Careful: Exhaust Valves Defective — Cylinder Head Damage (Serial Defect), HV Cables and E-Motor Integration Defective (PHEV), Chain Tensioner Loses Tension — Chain Rattling. Power: 204–211 PS.
C-Klasse (OM654, 2019–2021) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 194–200 PS.
What to watch out for with the Mercedes-Benz C-Klasse? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
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Last updated: February 2026 · All information without guarantee