What are the most common Mercedes-Benz CLS-Class problems?
According to Au7o's analysis of 0+ owner reports, the 2019-2019 Mercedes-Benz CLS-Class has 5 documented issues. The most frequently reported are: M264 2.0L Engine Stalling or No-Start from Crankcase Ventilation / Cylinder Head Vent Valve Fault, 48-Volt Integrated Starter-Generator / DC-DC Converter Failure Causing Warning Messages, Limp Mode, or No Restart, Panoramic Sunroof Creaking, Popping, or Binding from Glass/Frame Adjustment and Seal Friction. Of these, 2 are rated critical and should be addressed promptly.
Is the Mercedes-Benz CLS-Class reliable?
The 2019-2019 Mercedes-Benz CLS-Class has 5 known issues documented across 0+ owner reports. 2 issues are rated critical: M264 2.0L Engine Stalling or No-Start from Crankcase Ventilation / Cylinder Head Vent Valve Fault and 48-Volt Integrated Starter-Generator / DC-DC Converter Failure Causing Warning Messages, Limp Mode, or No Restart. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz CLS-Class problems?
Repair costs for known Mercedes-Benz CLS-Class issues range from $0 to $6,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, M264 2.0L Engine Stalling or No-Start from Crankcase Ventilation / Cylinder Head Vent Valve Fault, typically costs $0-$1,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2019-2024 Mercedes-Benz CLS-Class M264 2.0L Engine Stalling or No-Start from Crankcase Ventilation / Cylinder Head Vent Valve Fault?
Mercedes issued a recall covering certain vehicles with the M264 2.0L engine, including CLS 350 models, for a crankcase ventilation system problem in the cylinder head cover area. Owners reported rough running, check-engine lights, reduced power, stalling, or a no-start condition… Repairs typically run $0-$1,800. Severity: high.
What is the 2019-2024 Mercedes-Benz CLS-Class 48-Volt Integrated Starter-Generator / DC-DC Converter Failure Causing Warning Messages, Limp Mode, or No Restart?
Owners of six-cylinder CLS 450 models have reported failures in the 48V mild-hybrid system, including the integrated starter-generator, 48V battery support components, or DC-DC converter. Symptoms include 'Stop Vehicle Leave Engine Running,' multiple warning lights, loss of charg… Repairs typically run $1,200-$6,500. Severity: high.
What is the 2019-2024 Mercedes-Benz CLS-Class Panoramic Sunroof Creaking, Popping, or Binding from Glass/Frame Adjustment and Seal Friction?
A recurring owner complaint on the C257 CLS is noise from the panoramic roof area, especially over driveways, uneven pavement, or in hot/cold weather. The problem is usually not shattered glass but creaking or popping caused by seal friction, roof panel adjustment, or frame movem… Repairs typically run $100-$1,800. Severity: medium.
What is the 2019-2024 Mercedes-Benz CLS-Class Front Brake Squeal and Premature Rotor/Pads Wear on AMG-Line and AMG Variants?
Owners of CLS models with larger sport brake packages, especially CLS 450 AMG Line and AMG CLS 53, frequently report persistent front brake squeal, groan at low speeds, and faster-than-expected pad/rotor wear. In many cases the brakes still function normally, but noise and rotor… Repairs typically run $400-$2,200. Severity: medium.
What is the 2019-2024 Mercedes-Benz CLS-Class MBUX / Instrument Cluster Software Freezes, Black Screens, and Backup Camera Malfunctions?
Current-generation CLS models use the widescreen MBUX infotainment and digital cluster system, and owners have reported intermittent screen blackouts, frozen displays, reboot loops, inoperative audio/navigation, and backup camera image failures. Mercedes has issued multiple softw… Repairs typically run $150-$2,500. Severity: medium.
