Mercedes-Benz C-Klasse W206
Weaknesses, engine ratings and buying advice
408–680 PS
2.0L Turbo + E-Motor Benzin
C43 W206: Four-Cylinder AMG with Bite
Fun to Drive!381–421 PS
2.0L Turbo AMG Benzin
6 weaknesses
Good ChoiceBody Variants
The Mercedes-Benz C-Klasse W206 is available as Limousine and T-Modell — choose your body type for specific insurance data:
Generations
Engine Overview
The Mercedes-Benz C-Klasse W206 is available with 10 engine variants — from 116 to 680 hp. 2 variants had engine changes — the model year is crucial.
The Mercedes-Benz AMG C 43 (Benziner Mild-Hybrid, 408–435 PS) comes with 2 different engines: M139 (2022–2025, Good Choice) und M139L (2022–2025, Be Careful). Pay attention to the model year for the AMG C 43!
The Mercedes-Benz C 180 (Benziner Mild-Hybrid, 170 PS) has the M254 (2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 200 (Benziner Mild-Hybrid, 204 PS) has the M254 (2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 300 (Benziner Mild-Hybrid, 258 PS) has the M254 (2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz AMG C 63 S E Performance (Benziner Plug-in-Hybrid, 680 PS) has the M139L (2.0L Turbo + E-Motor) — rated: "Be Careful", 12 known weaknesses.
The Mercedes-Benz C 300e (Benziner Plug-in-Hybrid, 313 PS) has the M254 (2.0L Turbo) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz C 200d (Diesel Mild-Hybrid, 163 PS) has the OM654 (2.0L Diesel) — rated: "Be Careful", 11 known weaknesses.
The Mercedes-Benz C 220d (Diesel Mild-Hybrid, 194–200 PS) comes with 2 different engines: OM654 (2021–2025, Be Careful) und OM654 (2021–2025, Be Careful). Pay attention to the model year for the C 220d!
The Mercedes-Benz C 300d (Diesel Mild-Hybrid, 265 PS) has the OM654 (2.0L Diesel) — rated: "Be Careful", 11 known weaknesses.
The Mercedes-Benz C 300de (Diesel Plug-in-Hybrid, 313 PS) has the OM654 (2.0L Diesel) — rated: "Be Careful", 11 known weaknesses.
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Driver assistance systems with software errors Sporadic failures of ESP, emergency stop assistant, lane-keeping assist and cruise control. Cause often a ground cable misrouted at the factory. Symptoms: Warning messages in the instrument cluster, driver assistance systems switch off unexpectedly, warning lights without cause | Low | |
| MBUX infotainment freezes or restarts MBUX system shows crashes, restarts and connectivity problems. Software updates are regularly rolled out but do not fix all cases. Symptoms: Central screen freezes, navigation unresponsive, streaming apps crash, reversing camera shows no image | Low | |
| MBUX Software Crashes and Freezing MBUX infotainment system freezes or restarts, especially on long journeys. Early production runs up to mid-2023 more frequently affected. Symptoms: Screen freezes, navigation takes 15 seconds to respond, system spontaneously restarts. | Low |
Top Reported Issues
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Known Problems and Issues
A total of 42 weaknesses have been documented for the Mercedes-Benz C-Klasse W206 (2021–2025) — 35 engine-related and 7 vehicle-related. Typical issues affect Electronics, Brakes, Other, Suspension. Considered reliable: M139 (2.0L Turbo AMG).
C-Klasse (M254, 2021–2025) — Be Careful: Oil Consumption from Piston Rings (Early Production), Timing Chain — Rattle and Premature Wear, Exhaust Valves Defective — Cylinder Head Damage. Power: 170 PS.
C-Klasse (M254, 2021–2025) — Be Careful: Oil Consumption from Piston Rings (Early Production), Timing Chain — Rattle and Premature Wear, Exhaust Valves Defective — Cylinder Head Damage. Power: 204 PS.
C-Klasse (M254, 2021–2025) — Be Careful: Oil Consumption from Piston Rings (Early Production), Timing Chain — Rattle and Premature Wear, Exhaust Valves Defective — Cylinder Head Damage. Power: 252–258 PS.
C-Klasse (M139L, 2022–2026) — Be Careful: Recall Gearbox Wiring — Harness Too Short, Recall Main Fuse Box — 80A Fuse Defective, Recall HV Starter Generator — Software Fault. Power: 408 PS.
C-Klasse (M254, 2021–2025) — Be Careful: Oil Consumption from Piston Rings (Early Production), Timing Chain — Rattle and Premature Wear, Exhaust Valves Defective — Cylinder Head Damage. Power: 313 PS.
C-Klasse (M139L, 2023–2025) — Be Careful: Recall Gearbox Wiring — Harness Too Short, Recall Main Fuse Box — 80A Fuse Defective, Recall HV Starter Generator — Software Fault. Power: 680 PS.
C-Klasse (OM654, 2021–2025) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 163 PS.
C-Klasse (OM654, 2021–2025) — 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, 2021–2025) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 265 PS.
C-Klasse (OM654, 2022–2025) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 313 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