IsItAGoodCar
Reliability Guide

Common Problems with the
2006–2007 Mercedes-Benz B-Class (W245)

We've identified 3 known issues that can affect the 2006–2007 Mercedes-Benz B-Class (W245). 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

The 2006–2007 period has 2 more issues than the Mercedes-Benz B-Class (W245) average across all year periods.

All Known Issues

CVT gearbox failure

SeriousGearbox & Transmission

The CVT transmission can suffer from worn variators, overheating and mechatronic unit failures. Jerky acceleration and whining noises are common. Regular fluid changes are critical to延 life.

Most affected: B 180, B 200, B 200 Turbo

Estimated cost: £800–£2,500Affects: 2005–2011Often appears around: 60,000–100,000 miles

Typical symptoms

  • •Whining noise from gearbox
  • •Jerky acceleration
  • •Limp mode activation

What to inspect before you buy

  • ✓Smooth pull-away from cold
  • ✓CVT fluid change history
  • ✓Listen for whining under load

DPF blockage (diesel models)

ModerateEngine

The diesel particulate filter clogs quickly on short urban journeys, triggering limp mode. Regular motorway driving is needed for passive regeneration.

Most affected: B 180 CDI, B 200 CDI

Estimated cost: £150–£500Affects: 2005–2011Often appears around: 30,000–80,000 miles

Typical symptoms

  • •Limp mode
  • •DPF warning light
  • •Loss of power

What to inspect before you buy

  • ✓Ask about driving patterns
  • ✓Check for DPF warning history
  • ✓Look for evidence of DPF cleaning or forced regen

Seat belt webbing fraying

ModerateBodywork & Rust

The seat belt webbing on B-Class models is prone to premature fraying at the edges, which is an MOT failure. Replacement belts are surprisingly expensive.

Estimated cost: £150–£250 per beltAffects: 2005–2011Often appears around: Age-related

Typical symptoms

  • •Visible fraying on seat belt edges
  • •MOT advisory or failure for seat belt condition

What to inspect before you buy

  • ✓Inspect all seat belt webbing carefully
  • ✓Run the belt fully out and check edges

Buying Tips for the 2006 Mercedes-Benz B-Class (W245)

  • ✓If buying the CVT 'Autotronic' automatic, verify it has had fluid changes every 40,000 miles; shuddering or hesitations often mean terminal valve body failure.
  • ✓Inspect the bottom edges of the doors and the tailgate for rust, as the W245 is from an era where Mercedes still struggled with paint corrosion.
  • ✓Check the seat belts; they are notorious for fraying and becoming slow to retract, which is an instant MOT failure.
  • ✓On diesel models, ensure the DPF is not clogged from short urban journeys; look out for warning lights or a lack of power.
  • ✓Listen for clicking noises from the front driveshafts when turning tightly, which indicates worn CV joints.
  • ✓Test the air conditioning to ensure it blows cold; the condensers are mounted low at the front and frequently suffer stone damage.
2005 Mercedes-Benz B-Class (W245)2008 Mercedes-Benz B-Class (W245)

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Other Mercedes-Benz B-Class (W245) Year Periods

20052006–200720082009–20102011

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