2011 Mercedes-Benz B-Class 1.5L Petrol · LP11 TVK

The defining mechanical story of this 2011 Mercedes-Benz B-Class is a chronic and worsening pattern of braking and undercarriage deterioration, with two serious failures recorded in the space of just over two months in early 2026. The most recent test on 6 May 2026 resulted in a pass, but it carries a Minor defect for a severely deteriorated nearside front CV joint boot alongside advisories for defective gearbox mounting, worn front inner brake discs, and an offside rear tyre worn on edge. Just nine days earlier, the vehicle had failed outright on a Major defect for an excessively corroded central rear brake pipe, an outcome that demonstrates the braking system has been actively deteriorating rather than holding stable. Going further back, the February 2025 test produced a Dangerous failure for rear brake pads worn below 1.5 mm, plus a Major for excessively worn front anti-roll bar linkage ball joints, indicating the suspension and brake wear has been a multi-year concern rather than an isolated event. Against a fifteen-year age, the recorded mileage of 77,181 miles equates to an average of roughly 5,145 miles annually, which is notably low for the vehicle's age and points to either light commuter use or extended periods of inactivity. The MOT testing pattern itself supports this, with tests clustered in 2025 and 2026 rather than appearing in regular annual succession, suggesting the car has been off the road for stretches. Mechanically, this usage profile is a double-edged consideration: low annual mileage reduces wear on major drivetrain components such as the engine, clutch, and gearbox internals, but extended standing periods accelerate corrosion on underbody steel components, degradation of rubber boots and bushes, and moisture-related deterioration of brake hydraulic lines, all of which are precisely the items now appearing repeatedly in the test record. Any prospective buyer should treat the undercarriage as the primary area of physical inspection, beginning with a close examination of the brake pipework, particularly along the central rear section where corrosion forced the April 2026 failure. The pipe should be inspected for surface rust, flaking, and any signs of previous repair or replacement, as a fresh section welded in may indicate the surrounding pipework is equally compromised. The front inner brake discs, flagged as pitted and scored on both sides in consecutive tests, should be checked for lipping on the outer edge and for any pulsation through the brake pedal under firm application, as scored surfaces often produce judder and reduced braking efficiency especially in wet conditions. With the rear brake pads having been recorded as dangerously thin in early 2025, confirmation that a full rear brake overhaul including discs and pads has since been carried out is essential, and the handbrake should be tested on an incline for any tendency to slip or fail to hold. On the test drive, particular attention should be paid to symptoms reflecting the suspension and drivetrain wear already documented. The worn front anti-roll bar linkage ball joints recorded in February 2025 can produce clonking or rattling noises from the front end over speed humps and uneven surfaces, and any renewal should be verified by checking for fresh grease around the linkages and confirming the work was completed with genuine components. The defective gearbox mounting flagged in both 2026 tests commonly transmits as a judder or shunt on take-off and during低速 gear changes, particularly when moving between Drive and Reverse, so any clunking from the transmission tunnel warrants further investigation. The nearside front CV boot, recorded as severely deteriorated, will throw grease onto the surrounding suspension and exhaust if it has already split, and a clicking noise on full lock turns is the classic audible confirmation of an already failing joint. Finally, the rear seat belt webbing damage noted across both 2025 tests and the persistent offside rear tyre edge wear should be confirmed as remedied, as tyre wear on one specific edge often points to a rear suspension geometry issue such as a worn trailing arm bush or slight camber misalignment, both of which are common on a B-Class of this age.