2020 Mercedes-Benz Hymer 2.1L Diesel · CL63 POL

A documented pattern of brake-related advisories, combined with a headlamp aim failure that was rectified at the same test station, forms the mechanical backbone of this 2020 Mercedes-Benz Hymer's MOT history. The most recent examination on 15 August 2026 recorded a pass alongside an advisory for front brake disc wear, pitting and scoring on both inner surfaces, following a similar advisory twelve months earlier concerning corroded outer rear brake cables. Both passes before that, in August and January 2024, returned completely clean sheets with no advisories whatsoever, indicating that the braking system deterioration is a relatively recent development rather than a long-standing condition. The headlamp aim failure on 19 January 2024 was a present and rectified item on the same day, so it carries no ongoing implications, but it is worth confirming the adjustment mechanism remains stable as the lamps age. With 21,082 miles accumulated over roughly six years, the vehicle has averaged only around 3,500 miles annually, which is exceptionally low for a motorhome of this size and weight. Such modest usage typically reflects seasonal leisure use, long periods of storage between trips, or limited shakedown mileage. Mechanically, low annual mileage can be a double-edged sword; brake discs and pads suffer from surface oxidation and corrosion when left standing, particularly in damp conditions, and the recorded advisory for pitted inner front discs is entirely consistent with a vehicle that has seen prolonged inactivity between drives. Equally, infrequent use can dry out suspension bushes, allow seals to perish, and leave fuel and braking systems susceptible to moisture ingress, so the mileage figure should not be interpreted as a guarantee of mechanical freshness. A prospective buyer should focus closely on the braking system during any inspection. With the front discs already showing measurable pitting on both inner surfaces, feel for brake pedal roughness or vibration under firm application, listen for any binding or grinding from the front calipers on cold start, and check whether the vehicle pulls to either side under braking, which could indicate a sticking caliper slide or uneven pad transfer. The rear brake cables were flagged for outer corrosion last year, so visually inspect both rear cable runs for swelling, cracking or fraying of the outer sheath, and verify the handbrake operates with full travel and positive locking on a slope, as corroded cables commonly cause a spongy or late handbrake. Additionally, examine the front brake discs through the wheel for an obvious lip on the outer edge and compare inner and outer disc wear, as uneven wear patterns suggest caliper guide pin seizure rather than simple pad consumption. Beyond the flagged items, a motorhome of this age with such low mileage warrants attention to areas that suffer from standing rather than use. Inspect all visible suspension components, including coil springs, dampers and anti-roll bar linkages, for surface corrosion or perished rubber bushes, and bounce each corner to confirm the dampers resist repeated compression without continuing to oscillate. Check beneath the vehicle for any oil residue around the engine sump, differentials or axle seals, as standing vehicles sometimes develop weeping seals that only become apparent once fluid levels are checked. Confirm all exterior lighting functions correctly and re-check headlamp aim against a level surface, given the prior adjustment failure, and finally verify that the habitation area electrics, water systems and any auxiliary 12V batteries have been exercised regularly, as prolonged inactivity in motorhomes frequently causes more degradation through lack of use than through wear.