2016 Mercedes-Benz SLC 2.1L Diesel · UJN 1

The most recent MOT on 30 April 2026 was a pass, but it carried two advisories concerning the nearside and off‑side rear brake discs being worn, pitted or scored, although not yet weakened to the point of failure. Apart from that, the test was clear. The only failure in the ten‑year record occurred in February 2024 when the engine malfunction‑indicator lamp (MIL) was reported inoperative, a fault that appears to have been rectified before the subsequent February 2025 pass. Overall the MOT history shows a generally stable maintenance pattern with a single electronic fault that has since been resolved, but the recurring brake‑disc advisories indicate a component that will require attention in the near future. At ten years old the SLC has only 29 256 miles on the clock, equating to roughly 2 900 miles per annum – well below the average for a vehicle of its class. Such low utilisation often points to periods of infrequent use or prolonged storage, which can be as consequential as high mileage. Light use reduces wear on consumables such as tyres, brake pads and clutch, yet it also means that seals, gaskets and rubber components may have aged without the benefit of regular heating cycles, and corrosion can develop on the chassis or suspension mounts during idle periods. The brake‑disc advisories merit immediate inspection. Measure the disc thickness against the manufacturer’s minimum specification and look for deep scoring or heat‑affected cracking. On a test drive, listen for a high‑pitched squeal that does not disappear when the pads are warmed, feel for any pulsation through the pedal that may indicate uneven disc wear, and check for a soft or spongy rear braking feel which could suggest the discs are nearing the end of their service life. Replacement of the rear discs, and possibly the pads, should be scheduled before the next service interval to avoid a future MOT failure. The earlier MIL fault suggests an intermittent sensor or ECU issue; a contemporary diagnostic scan is essential to confirm that the fault code has been cleared and that no pending emissions or engine management errors remain, as a latent fault could trigger a future failure or affect fuel efficiency. Given the vehicle’s age and low mileage, a thorough visual and tactile examination is advisable. Inspect all four tyres for sidewall cracking, dry‑rot or age‑related hardening, even if tread depth appears adequate, and verify that the tyre manufacture dates are within the six‑year safety window. Test the 12 V battery under load, as long periods of storage can lead to sulphation and reduced cranking power. Examine the suspension for any dried or cracked rubber bushings, especially the front lower arms and rear trailing arms, and feel for any clunk or knock when the car is driven over bumps. Check for signs of corrosion on the under‑tray, exhaust hangers and wheel arches, and ensure that all fluid reservoirs – engine oil, brake fluid, coolant and power‑steering fluid – have been topped up and replaced according to calendar intervals rather than mileage alone. A complete service record, including recent oil and filter changes and any timing‑chain or valve‑train work, will further confirm that the SLC has been kept in a condition appropriate to its age and will help the buyer gauge any impending maintenance commitments.