2011 Mercedes-Benz B-Class 1.5L Petrol · LL11 EWP

The most recent MOT, dated 21 January 2026, was passed but recorded a minor central‑exhaust leak advisory. The preceding test a week earlier resulted in a failure for service‑brake efficiency, a non‑functioning near‑side side‑repeater, and an insufficient washer‑fluid supply, together with the same exhaust‑leak advisory. Earlier years show a pass in 2025 with only a registration‑lamp fault and a 2024 pass that highlighted tyre wear near the legal limit and slight play in the near‑side front anti‑roll‑bar linkage. Overall the trend is improving – the major brake failure has not re‑appeared and the vehicle now passes, yet recurring advisories indicate that some components have not been fully rectified and merit close scrutiny. At 72 362 miles the car averages roughly 4 800 miles per annum, which is considerably below the typical usage for a fifteen‑year‑old B‑Class. Such low annual mileage often points to periods of extended storage or very light duty rather than high‑stress operation. While reduced wear can be advantageous for engine, transmission and suspension components, prolonged standing can accelerate rubber perishing, corrosion of brake discs and calipers, and battery sulphation. Potential gaps in service intervals should be investigated, particularly any long intervals between oil changes or coolant flushes that may have been missed due to the low mileage narrative. When you inspect the vehicle, give particular attention to the exhaust system – a minor leak at the central pipe can manifest as a faint hissing or a sulphur‑like smell, especially at idle, and may indicate a cracked pipe or deteriorated gasket that could worsen under load. Verify that the service‑brake pedal feels firm and does not travel excessively; any soft or spongy feel could be a residual symptom of the previous efficiency failure, and the brake discs should be examined for uneven wear or rust‑pitting that can cause shudder. The near‑side side‑repeater (indicator) must flash correctly on both left‑turn and hazard functions, and the windscreen washer system should deliver a steady spray; a weak spray often signals a clogged nozzle or a leaking hose that can be remedied cheaply. The front tyres, flagged in 2024 as close to the legal tread limit and showing edge wear, should be measured for depth and inspected for sidewall cracks, as age‑related cracking can appear even on low‑kilometre tyres. The anti‑roll‑bar linkage ball joint with slight play should be checked for any clunk or looseness when cornering; excessive play can affect handling stability and may require bush replacement. Beyond the recorded defects, a vehicle of this age and usage profile warrants a broader age‑related inspection. Examine the battery for sulphation – a voltage test should read around 12.6 V at rest, and the terminals must be clean and tight. Inspect the under‑carriage for rust, especially around the wheel arches, suspension mounts and exhaust hangers, as long periods of inactivity promote corrosion. Verify that all fluid reservoirs – engine oil, coolant, brake fluid and power‑steering fluid – are topped up and that the fluids are not discoloured or contaminated; a 2‑year interval for coolant and brake fluid replacement is typical for a Mercedes of this generation. Finally, confirm that the service book contains regular oil changes, timing‑chain or belt service records, and that any recall work applicable to the B‑Class has been completed, as these factors together will give a clearer picture of the car’s long‑term reliability.