2010 Mercedes-Benz C 2.1L Diesel · SL60 MSX

The defining mechanical story of this Mercedes-Benz C-Class is a clear and progressive deterioration of the underbody braking and suspension components, culminating in two failed MOT tests on related safety-critical parts. From the first recorded advisory on the brake pipes in 2018, when all four lines were flagged as corroded but covered in grease, the condition worsened rapidly. By August 2019 the nearside and offside rear brake pipes were recorded as excessively corroded at failure, alongside a dangerous nearside front lower suspension arm ball joint finding and two dangerous tyre failures. After the vehicle passed in 2020 following repairs, it failed again the very next day with both front outer brake pipes now recorded as excessively corroded, demonstrating that the underlying corrosion issue had spread across the full brake pipe circuit rather than being resolved. The most recent test on 13 May 2022 recorded a pass with no advisories, but the intervening years and the pattern of escalating corrosion on the braking system remain the most significant concern in the record. Recorded mileage of 73,254 miles across sixteen years equates to an average accumulation of roughly 4,578 miles annually, which is notably low for the vehicle's age. The testing history is continuous from 2017 through 2022 with no extended gaps or lay-up periods, suggesting the car has been in regular use rather than stored, yet the mileage has accrued at a slow rate. This pattern means the engine and drivetrain are unlikely to have suffered from high-load wear associated with motorway mileage, but it also implies that short-trip usage may have accelerated underbody corrosion through limited drying cycles after wet weather exposure, which aligns directly with the progressive brake pipe deterioration observed in the records. For a prospective buyer, the priority must be a meticulous underbody inspection focused on the braking system and suspension. The brake pipes were flagged at every test from 2018 onwards and failed catastrophically in 2019 and again in 2020, so a thorough check of all four brake lines, their joints, and the ABS modulator connections for advanced corrosion, flaking, or perforation is essential. Given that the nearside front lower suspension arm ball joint was recorded as excessively worn in 2019, the front suspension should be examined for renewed play or knocking, with particular attention to knocking or clonking noises transmitted through the cabin over uneven surfaces or speed bumps. Any clunking from the front end, vague steering, or uneven tyre wear on the nearside front would suggest the joint or related bushes require replacement. It is also worth noting that the 2020 test was only one day after a pass, indicating that the front brake pipe corrosion developed rapidly enough to fail inspection almost immediately after the previous assessment, which highlights how quickly this condition can advance on this chassis. The tyre history further reinforces the case for a careful inspection. Two dangerous tyre failures were recorded in 2019 for tears caused by structural separation on the inner side walls, and advisories for sidewall cracking or perishing were carried forward into 2020. Although no tyre defects were noted in 2022, the pattern suggests the wheels and tyres have been subjected to kerbing or load stress, and a close visual check of all four sidewalls for bulges, cracking, or uneven wear is advisable. Finally, the minor position lamp failure in 2020 was a straightforward electrical item, but it is worth confirming that all exterior lighting functions correctly, as the multiple light source units on this model can suffer from individual LED or bulb failure over time.