2021 Mercedes-Benz GLA35 AMG

The 2021 Mercedes-Benz GLA35 AMG is a compact performance SUV that blends sporty driving dynamics with everyday usability. The GLA35 is equipped with a turbocharged 2.0-liter inline-4 engine, producing 302 horsepower and 295 lb-ft of torque, paired with an 8-speed dual-clutch automatic transmission. While owners appreciate the GLA35’s quick acceleration, agile handling, and stylish interior, some have reported issues that detract from the overall ownership experience. Common complaints include infotainment glitches, suspension stiffness, and occasional build quality concerns. The standard GLA250 is equipped with a less powerful version of the same 2.0-liter engine while the GLA45 AMG has a more powerful version producing 382 horsepower and 350 lb-ft of torque.

Engine

2.0L Turbocharged Inline-4 (M260)

• Excessive Oil Consumption
  • Description/Symptoms: Some owners have reported higher than expected oil consumption, requiring more frequent top-ups between oil changes. Symptoms may include low oil level warnings and visible exhaust smoke.
  • Solution: The solution varies. Some owners have reported that software updates have been sufficient while others have required replacement of the piston rings.
  • Estimated Cost to Fix: $2,000 - $5,000+ (for piston ring replacement)
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Premature turbocharger failure has been reported by some owners. Symptoms include a loss of power, unusual noises (whining, screeching) from the engine, and potential check engine light illumination.
  • Solution: Turbocharger replacement is typically required.
  • Estimated Cost to Fix: $2,500 - $4,000+
  • Recalls: None Found

Transmission

8-Speed Dual-Clutch Automatic (DCT)

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners have experienced rough or jerky shifting, particularly at lower speeds, and hesitation when accelerating from a stop. The transmission may feel less smooth than expected for a luxury vehicle.
  • Solution: In some cases, a software update can resolve the issue. In other cases, a transmission flush or even replacement of valve bodies within the transmission may be required.
  • Estimated Cost to Fix: $150 (Software Update) - $3,000+ (Valve Body Replacement)
  • Recalls: None Found
• Transmission Slippage
  • Description/Symptoms: Reports of the transmission slipping during gear changes, especially under heavy acceleration. This can manifest as a momentary loss of power or a delay in engagement.
  • Solution: Diagnosis is crucial. Could be low fluid, a faulty sensor, or internal damage requiring a rebuild or replacement.
  • Estimated Cost to Fix: $100 (Fluid Top Off) - $6,000+ (Transmission Replacement)
  • Recalls: None Found

Suspension

• Stiff Ride Quality
  • Description/Symptoms: The GLA35 AMG is known for its firm suspension, which can translate to a harsh ride on rough roads. This is especially noticeable on models equipped with larger wheels.
  • Solution: While the ride is inherently firm due to the AMG’s sporty tuning, some owners have found relief by lowering tire pressures slightly (within recommended limits). Aftermarket suspension components are also available, but can be expensive.
  • Estimated Cost to Fix: $50-$100 (Tire Pressure Adjustment), $1,500 - $4,000+ (Aftermarket Suspension)
  • Recalls: None Found
• Suspension Component Wear
  • Description/Symptoms: Reports of premature wear in suspension components, such as bushings and struts, leading to noises (clunking, rattling) and diminished handling performance.
  • Solution: Replacement of the worn components is necessary.
  • Estimated Cost to Fix: $300 - $1,000+ per corner (depending on the component)
  • Recalls: None Found

Electrical

• Infotainment System Glitches
  • Description/Symptoms: The MBUX infotainment system can experience various glitches, including freezing, lagging, random reboots, and connectivity issues with smartphones.
  • Solution: Software updates are often released to address these issues. A hard reset may also be necessary. In rare cases, the infotainment unit may need to be replaced.
  • Estimated Cost to Fix: $0 (Software Update) - $1,500+ (Infotainment Unit Replacement)
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Issues with various sensors (e.g., parking sensors, blind-spot monitoring, lane-keeping assist) can occur, resulting in warning lights and/or system malfunctions.
  • Solution: Diagnosis and replacement of the faulty sensor are required.
  • Estimated Cost to Fix: $200 - $800+ (depending on the sensor)
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Sunroof Rattling
  • Description/Symptoms: Rattling or creaking noises emanating from the sunroof area, particularly when driving on uneven surfaces.
  • Solution: Adjustment or lubrication of the sunroof mechanism may resolve the issue. In some cases, replacement of worn seals or components may be necessary.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found
• Trim Peeling/Loose
  • Description/Symptoms: Some owners have reported trim pieces, particularly on the dashboard or door panels, peeling or becoming loose.
  • Solution: Replacement or re-attachment of the affected trim piece.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary

The 2021 Mercedes-Benz GLA35 AMG, while offering a compelling blend of performance and practicality, has its share of potential issues. Engine-related problems like excessive oil consumption and turbocharger failures can be expensive to address. Transmission issues, particularly rough shifting, are also a common complaint. Electrical glitches with the infotainment system are frustrating but often resolved with software updates. While the overall reliability is generally acceptable, potential buyers should be aware of these potential issues and factor them into their purchasing decision. The severity of the issues ranges from minor inconveniences to costly repairs, with repair costs potentially reaching several thousand dollars for major engine or transmission work.