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Mercedes Benz Mercedes Benz X247 (Glb Class)

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Mercedes-Benz GLB-Class (X247): A Comprehensive Guide

The Mercedes-Benz GLB-Class (X247) is a compact luxury crossover SUV introduced in 2019 as a 2020 model. Bridging the gap between the GLA and GLC in Mercedes-Benz's lineup, the GLB distinguishes itself with a more boxy, utilitarian design, offering optional third-row seating, a rare feature in this segment. It's positioned as a practical and family-friendly option for buyers who want a luxury vehicle with added versatility and space.

Generations

First Generation (X247; 2019 – Present)

  • Years: 2019 - Present
  • Key Features:
    • Boxy, upright styling inspired by the larger GLS-Class.
    • Optional third-row seating, accommodating up to seven passengers.
    • MBUX infotainment system with voice control and touchscreen interface.
    • Available with front-wheel drive (FWD) or 4MATIC all-wheel drive (AWD).
    • Engine options include turbocharged 2.0-liter inline-4 gasoline engines and diesel engines (depending on market).
    • AMG GLB 35 performance variant with a more powerful engine and sport-tuned suspension.
    • Facelift in 2023 brought updated styling, interior upgrades, and enhanced technology.

Reliability & Common Issues

While the GLB is a relatively new model, several potential reliability concerns and common issues have emerged. It's important to note that these issues may not affect all vehicles, and regular maintenance can mitigate some risks.

Engine Issues:

  • 2.0-Liter Turbocharged Engine (M260/M264):
    • Oil Consumption: Some owners have reported excessive oil consumption, potentially related to piston ring issues or valve stem seal problems. Regular monitoring of oil levels is crucial.
    • Turbocharger Problems: Turbocharger failures, while not widespread, have been reported. Symptoms include loss of power, unusual noises, and diagnostic trouble codes (DTCs) related to turbocharger performance.
    • Cooling System Leaks: The cooling system, particularly hoses and the water pump, can be prone to leaks. Check for coolant leaks regularly and address them promptly to prevent overheating.
    • High-Pressure Fuel Pump (HPFP): Although less common than on older engines, HPFP failures are still a potential issue and can lead to stalling and starting problems.
  • Diesel Engines (OM654):
    • AdBlue System Issues: Diesel models equipped with AdBlue (Diesel Exhaust Fluid) systems can experience problems with the sensors, pumps, or injectors, leading to error messages and reduced engine performance.
    • DPF (Diesel Particulate Filter) Problems: Clogging of the DPF can occur, especially with short trips or infrequent highway driving. Regular regeneration cycles are necessary to maintain DPF health.

Transmission Issues:

  • 8-Speed Dual-Clutch Transmission (DCT):
    • Rough Shifting: Some owners have reported rough or jerky shifting, particularly at low speeds or during stop-and-go traffic. Software updates can sometimes alleviate these issues, but in some cases, transmission repair or replacement may be necessary.
    • Mechatronic Unit Failure: The mechatronic unit (transmission control unit) can fail, leading to shifting problems and potential loss of drive.

Electrical Issues:

  • MBUX Infotainment System Glitches: The MBUX system can experience glitches, including screen freezes, slow response times, and connectivity issues. Software updates are frequently released to address these problems.
  • Sensor Malfunctions: Various sensors, such as those for the parking assist system, blind-spot monitoring, and adaptive cruise control, can malfunction, leading to warning lights and impaired functionality.
  • Battery Problems: The battery can drain quickly, particularly if the vehicle is not driven frequently. Regular charging or battery replacement may be required.

Other Potential Issues:

  • Suspension Noises: Some owners have reported creaking or squeaking noises from the suspension, particularly over bumps.
  • Interior Trim Rattles: Rattles and squeaks from the interior trim can develop over time, especially in vehicles driven on rough roads.

Recommendation: Thoroughly inspect any used GLB-Class for signs of these issues. Obtain a pre-purchase inspection from a qualified mechanic experienced with Mercedes-Benz vehicles. Check for service records to verify regular maintenance and any repairs that have been performed. Pay particular attention to the engine's oil level, transmission performance, and the functionality of the MBUX system.

Driving Experience

Pros:

  • Comfortable Ride: The GLB offers a comfortable and composed ride, especially on well-maintained roads.
  • Spacious Interior: The interior is relatively spacious for a compact SUV, particularly in the first two rows.
  • Optional Third-Row Seating: The optional third-row seating provides added versatility for families, although it's best suited for children or shorter adults.
  • User-Friendly Technology: The MBUX infotainment system is intuitive and feature-rich, offering advanced voice control and smartphone integration.
  • Refined Powertrain: The turbocharged engines provide adequate power and smooth acceleration.
  • AMG GLB 35 Performance: The AMG GLB 35 delivers a more exhilarating driving experience with its more powerful engine, sport-tuned suspension, and enhanced braking system.

Cons:

  • Tight Third-Row Seating: The third-row seats are cramped and not suitable for adults on long trips.
  • Higher Price Point: The GLB-Class is more expensive than many of its competitors.
  • Fuel Economy: Fuel economy is average for the class, but not exceptional.
  • Transmission Jerkiness: The dual-clutch transmission can exhibit some jerkiness at low speeds.

The GLB provides a balanced driving experience, emphasizing comfort and practicality over outright sportiness (except for the AMG variant). The available 4MATIC all-wheel-drive system enhances traction and stability in inclement weather.

Buying Advice

Years to Look For:

  • 2023 and Newer: The facelifted models (2023+) generally offer improved styling, upgraded interior features, and enhanced technology, potentially addressing some of the earlier issues. Look for examples with updated MBUX software.
  • Check Service History: Regardless of the year, prioritize models with complete and verifiable service records, indicating regular maintenance and proactive care.

Years to Avoid (or be cautious of):

  • Early Production Models (2020): Early production models may be more prone to initial quality issues. A thorough pre-purchase inspection is especially crucial for these vehicles.
  • High Mileage Examples Without Service Records: Avoid vehicles with high mileage and lacking documented maintenance, as they may require significant repairs in the near future.

Specific Considerations:

  • Third-Row Seating: If you need a seven-seater, carefully evaluate whether the GLB's third row is sufficient for your needs. If you rarely need the extra seating, consider a five-seater GLB or a larger SUV.
  • AMG GLB 35: If you prioritize performance, the AMG GLB 35 is a compelling option, but be prepared for higher running costs (fuel, maintenance, and insurance).
  • Pre-Purchase Inspection: Always obtain a pre-purchase inspection from a reputable mechanic specializing in Mercedes-Benz vehicles. This can help identify potential problems before you buy.
  • Warranty: Consider purchasing an extended warranty to protect against unexpected repair costs, especially if buying a used GLB with higher mileage.

By carefully considering these factors, you can make an informed decision and find a Mercedes-Benz GLB-Class that meets your needs and budget.

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