UK Reliability Directory

Mercedes-Benz A-Class (W168)

Production Years: 1998 - 20053 Documented Faults

The original high-roof Mercedes-Benz A-Class (W168) was a clever and space-efficient attempt to reinvent the small car, famous for its 'sandwich floor' safety design. Positioned as an entry-level premium hatchback, it introduced Mercedes ownership to a broader UK audience but suffered early reputational damage from the infamous 'elk test' rollovers. In the UK today, its incredibly cheap purchase price is offset by potentially ruinous repair bills due to its densely packed engine bay. Age now means that severe rust, snapped springs, and semi-automatic gearbox issues matter far more than the novelty factor, making it suitable only for brave bargain hunters or DIY mechanics.

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Common Faults & Reliability

These are the most common documented problems for the Mercedes-Benz A-Class (W168), sorted by their typical impact and frequency.

Rear axle and floor corrosion

high severity

Older W168s can corrode around the rear axle mounts and floor seams badly.

Est. repair cost:£400–£1,500+

CVT / Sequentronic gearbox failure

high severity

The CVT and semi-automatic Sequentronic gearboxes can suffer from wear to the variator, clutch packs and mechatronic units. Repairs are often uneconomical on higher-mileage cars.

Est. repair cost:£800–£2,500

Water ingress and electrical faults

medium severity

Blocked sunroof drains and degraded door seals allow water into the cabin, which can corrode underfloor electronics and wiring connectors, causing random warning lights and intermittent faults.

Est. repair cost:£100–£600

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