1998 Mercedes-Benz C 2.5L Diesel · R694 AOF

A 28-year-old Mercedes-Benz C-Class carrying 197,827 miles presents a roadworthiness record defined by one persistent mechanical theme: chronic front suspension wear combined with steadily progressing brake pipe corrosion across the underbody. Across seven recorded MOT tests spanning 2017 to 2025, every single examination has surfaced advisories relating to the front upper suspension arm ball joints, with slight play recorded on the nearside in 2017, both sides in 2018 and 2019, and continuing on the nearside through to the most recent pass dated 14 May 2025. The front inner track rod end ball joints have similarly been flagged for slight play on multiple occasions, most recently on both sides at the 2025 test. This is a textbook wear pattern for a high-mileage Mercedes of this era, where the pressed-steel upper wishbones and steering linkages fatigue over decades of use, but the consistency of the advisories suggests the deterioration is incremental rather than acute, with no progression to failure-level defects. The exhaust system has also produced a recurring minor leak advisory from 2023 and 2024, pointing to a deteriorated joint or flexi section that has not yet been rectified. No failures, dangerous defects, or structural corrosion advisories appear anywhere in the recorded history. The mileage profile of roughly 7,065 miles per year sits squarely within typical parameters for a vehicle of this age, and the testing record shows annual or near-annual MOT submissions with no extended gaps that would suggest the car has been laid up or off the road for prolonged periods. The relatively consistent testing cadence from 2017 through 2025 indicates continuous operational use, which mechanically means wear items have been accumulating under normal load rather than suffering the dried-out seals, corroded brake surfaces, and seized caliper pistons that plague long-stored vehicles. That said, 197,827 miles is substantial by any measure, and consumable life across the braking system, suspension, engine mounts, gearbox mounts, and drivetrain will reflect that accumulated distance even where the MOT record does not specifically flag it. For a prospective buyer, the front suspension components are the primary mechanical concern to investigate physically, as advisories only record what is visible on a ramp rather than the full dynamic state of the bushings and joints. On a test drive, listen for clonking or knocking noises from the front end over uneven surfaces, particularly over speed humps and potholes, as worn upper wishbone ball joints typically produce a dull metallic thud rather than a sharp rattle. Under heavy braking, feel for any wandering or pulling in the steering, and check for judder through the brake pedal which can indicate warped front discs exacerbated by the play in the steering and suspension geometry. With the vehicle on level ground and the engine off, rock each front wheel top and bottom while watching for movement at the upper arm and track rod end, and push and pull the wheel at three and nine o'clock to detect any slack in the inner tie rod joints. The nearside front upper arm ball joint has been flagged continuously since 2017, so replacement of the complete upper wishbone assembly is likely overdue even if not yet at failure threshold. The brake pipe corrosion pattern is equally worth close scrutiny. The offside rear brake line has been flagged as corroded in five separate tests from 2019 through 2023, and the 2025 test extended the concern to both front brake pipes, indicating that underbody corrosion is spreading across the full brake circuit rather than remaining isolated. On inspection, the vehicle should be raised to allow visual examination of the brake lines along their full length, particularly at the chassis mounting clips and any sections shielded by undertrays, as surface corrosion visible at MOT can mask more advanced section loss in concealed areas. Any spongy pedal feel, excessive travel, or the need to pump the pedal to build pressure would suggest hydraulic issues requiring immediate attention. The exhaust leak advisories from 2023 and 2024 warrant a cold-start listen for ticking or hissing from the centre section, and a check for sooting around the joint area. Beyond these flagged items, a compression test and inspection of the engine oil for coolant contamination would be prudent given the mileage, along with a check for play in the automatic or manual gearbox mounts, none of which are visible during a standard MOT examination but are entirely consistent with a Mercedes of this age and distance.