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About the Mercedes-Benz B-Class
AI-generatedThe Mercedes-Benz B-Class is a premium compact MPV that combines practicality with the build quality and refinement expected from the three-pointed star. Launched in its second generation in 2011 and replaced by the third generation in 2019, it offers a raised driving position, spacious interior, and versatile boot space in a relatively compact footprint. Based on Mercedes' A-Class platform, the B-Class shares many mechanical components but prioritises space and practicality over sporting dynamics. Available with a range of petrol and diesel engines, including efficient eco-focused variants and sporty AMG Line trims, the B-Class appeals to families and those seeking a practical premium vehicle. The interior quality is generally excellent, featuring Mercedes' MBUX infotainment system in later models, while the higher seating position and good visibility make it easy to drive in urban environments. While not as engaging to drive as some rivals, it excels as a refined, comfortable family car with low running costs.
Known Issues
Known Issues
W246 (2011-2018)
2011-2018
- Dual-clutch automatic gearbox (7G-DCT) can suffer from jerky operation and premature wear, particularly in earlier models
- AdBlue system faults on diesel models can cause warning lights and potential limp mode
- Electric power steering can develop faults, causing warning lights and heavy steering
- Turbocharger issues on some diesel engines, particularly the 2.1-litre units
- Thermostat failures causing overheating or slow warm-up
- Suspension component wear, especially front wishbone bushes and drop links
W247 (2019-present)
2019-present
- MBUX infotainment system software glitches requiring updates
- Mild hybrid (EQ Boost) system faults on some models
- AdBlue system errors on diesel variants
- Some reports of rattles from interior trim and dashboard
- Rear suspension bushes can wear prematurely on early examples
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Running Costs
Running Costs
Annual Fuel
£1,400-£1,900
Insurance Group
18-28
Average Service
£350-£550
Cost Calculator
Typical Prices
£24,000 - £30,000
£18,000 - £24,000
£14,000 - £19,000
£7,000 - £11,000
Pros & Cons
Pros & Cons
Pros
- Spacious interior with excellent rear legroom and generous boot space
- High-quality cabin materials and build quality
- Raised seating position provides good visibility
- Efficient engine range with low emissions
- Comfortable and refined ride quality
- Strong safety credentials with comprehensive equipment
Cons
- Dual-clutch gearbox can be problematic on older models
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Best & Worst Years
Best & Worst Years
Best Years
- 2019 - First year of the much-improved W247 generation with better technology, MBUX system, and more efficient engines
- 2021 - Fully sorted third-generation model with refined mild-hybrid engines and all early production issues resolved
- 2015 - Mid-cycle W246 model with most early issues resolved and improved dual-clutch gearbox software
Worst Years
- 2012 - Early W246 models suffered most from dual-clutch gearbox issues and teething problems
- 2013 - Continued gearbox reliability concerns and early diesel engine problems with turbos and AdBlue systems
Buying Checklist
Engine5 items
- Check for smooth cold start and no excessive smoke
- Listen for turbocharger whistle or unusual noises
- Verify AdBlue system works correctly on diesel models (no warning lights)
- Check coolant level and condition - thermostat failures are common
- Ensure oil level is correct and oil appears clean
Did You Know?
Did You Know?
The B-Class was originally designed with a 'sandwich' floor that could accommodate fuel cells or batteries, making it one of Mercedes' first vehicles engineered for alternative powertrains
Mercedes offered an all-electric version called the B250e from 2014-2017, using Tesla battery technology
Despite being classed as an MPV, the B-Class has never offered seven seats, focusing instead on a spacious five-seat layout
The B-Class shares its platform with the A-Class, CLA, and GLA, but offers significantly more rear legroom and boot space
Alternatives to Consider
BMW 2 Series Active Tourer
Direct rival offering similar space and premium feel with better driving dynamics
Volkswagen Golf SV
More affordable with similar practicality and lower running costs
Audi A3 Sportback
Premium alternative with sportier styling, though less interior space
MINI Countryman
6/10Shares platform with B-Class but offers more distinctive styling and fun driving experience
Owner Tips
- 1Have the dual-clutch gearbox serviced every 40,000 miles on W246 models to prevent premature wear
- 2Ensure AdBlue system is properly maintained on diesel models - use quality fluid and don't let the tank run completely dry
- 3Check service history carefully - Mercedes servicing is essential for warranty and reliability
- 4Inspect electric power steering for any unusual noises or warning lights before purchase
- 5The AMG Line suspension can be quite firm - test drive both standard and AMG Line variants
- 6Keep MBUX infotainment software updated to avoid glitches on newer models
- 7Check for suspension wear, particularly front bushes, on higher mileage examples
Check a specific Mercedes-Benz B-Class
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