1994 Mercedes-Benz SL 2.8L Petrol · K6 DTB

The most recent MOT, carried out on 29 September 2025, was passed but recorded two advisories concerning slight corrosion of the power‑steering pipe/hose and rust on the gearbox oil‑cooler pipes. This follows a failure on 26 September 2025 for a leaking rear brake hose and the same steering and gearbox advisories, and a more serious failure in June 2022 for excessive exhaust emissions and a continuous engine oil leak. Since the 2022 major failures the vehicle has consistently passed its MOT, with only minor, non‑dangerous advisories appearing in the last three years, indicating that the overall maintenance trend has moved from a period of significant remedial work to a relatively stable, if still slightly ageing, condition. At 133,742 miles the car averages just over 4,000 miles per annum, well below the typical usage for a 1994 model. Such low annual mileage often points to long periods of storage or very light use, which can be as detrimental as high mileage because components age regardless of distance. Prolonged standing can accelerate rubber and polymer degradation, promote corrosion on metallic parts, and allow fluids to break down even when the engine is not being run. Consequently, the low mileage does not automatically guarantee a low wear state; rather, it shifts the risk profile towards age‑related deterioration. Prospective buyers should give particular attention to the power‑steering system and the rear brake hose. Inspect the steering pipe and hose for any signs of external corrosion, cracking or fluid seepage, and test the steering feel for any gritty or uneven resistance, especially at low speeds. The rear brake hose connection should be examined closely for any wetness or oil‑type residue; a leaking hose can cause a loss of rear brake pressure and a spongy pedal feel. During a test drive, listen for a whining or groaning noise from the steering pump, feel for any pull to one side, and apply the rear brakes gently to ensure a firm, consistent pedal response without pulsation. Verify that the engine oil level is correct, that there are no fresh oil drips on the under‑tray, and that the exhaust is clean‑running with no excessive smoke, which would indicate lingering issues from the 2022 emissions failure. Given the car’s age, a thorough visual and tactile inspection of age‑sensitive items is essential. Check all tyre sidewalls for cracking, dry rot or hardening, and confirm that tread depth is even; older tyres can become unsafe even if the mileage is low. Examine the battery terminals for corrosion and test the charge, as a 30‑year‑old battery is likely to be near the end of its service life. Look for rust on the chassis, suspension bushes, and brake discs, and verify that the discs are not heavily scored or rust‑capped, which could cause brake shudder. Finally, confirm that the service book is up to date, that timing belt or chain intervals have been respected, and that all fluid reservoirs (coolant, brake, power‑steering, and gearbox) contain fresh, correctly coloured fluids, as time‑based degradation can lead to seal failure and subsequent leaks.