Mercedes-Benz Slk MOT Pass Rate & Official DVSA Failure Statistics

Mercedes-Benz Slk MOT History and Failure Rates vs UK National Average

The Mercedes-Benz Slk passed on its first attempt in 75.8%, and its overall record sits −1.1 percentage points below the national average for all cars. These figures come from every recorded DVSA MOT test for the Mercedes-Benz Slk in the 2023–2025 data: 191,422 tests across 17 model years (2000–2016). A test still carries exactly one pass or fail verdict.

Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.

Most Common Mercedes-Benz Slk MOT Problems by Failure Category

Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Mercedes-Benz Slk, the Suspension section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.

Shares are over the Mercedes-Benz Slk's recorded defect strings, merged across its year pages.

Top Recorded Mercedes-Benz Slk DVSA MOT Test Statistics & Defect Descriptions

The descriptions below are the exact DVSA failure strings testers recorded most often for the Mercedes-Benz Slk, each with how many of the model's 191,422 tests it was noted on.

• "Coil spring fractured or broken" (Major) — noted on about 8,038 Mercedes-Benz Slk tests, 4.2% of the model's MOT record.
• "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 4,781 Mercedes-Benz Slk tests, 2.5% of the model's MOT record.
• "Ball joint excessively worn" (Major) — noted on about 4,304 Mercedes-Benz Slk tests, 2.2% of the model's MOT record.
• "Headlamp lens slightly defective" (Minor) — noted on about 2,256 Mercedes-Benz Slk tests, 1.2% of the model's MOT record.
• "Rigid brake pipes excessively corroded" (Major) — noted on about 2,228 Mercedes-Benz Slk tests, 1.2% of the model's MOT record.
• "Linkage ball joint dust cover ball joint dust cover severely deteriorated" (Minor) — noted on about 2,157 Mercedes-Benz Slk tests, 1.1% of the model's MOT record.

Best and Worst Mercedes-Benz Slk Model Years by Pass Rate

The strongest Mercedes-Benz Slk model year on record is 2016 (87.2% across 4,167 tests), and the weakest is 2004 (75.8%). The gap between them is 11.4 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.

Mercedes-Benz Slk reliability is improving in the DVSA data — the pass rate moves about 1.1 points a year across the most recent model years shown above.

Newest model year first. Only years with at least 50 recorded tests are listed.

Pre-MOT Inspection Checklist for Mercedes-Benz Slk Owners

These checks follow this Mercedes-Benz Slk's own most-recorded failure strings, starting with what a tester is most likely to flag on a Mercedes-Benz Slk.

• the coil springs — “coil spring fractured or broken”

  Look up inside each wheel arch with a torch, all the way round the spring. A snapped spring usually breaks at the very bottom coil, where a quick glance will not reach.

• the windscreen — “windscreen damaged”

  Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.

• the suspension joints — “ball joint excessively worn”

  With the car parked on level ground, rock the top of each front wheel in and out while someone watches the suspension arm. Clunks, or rubber boots split and greasy, are what testers record here.

Derived from the DVSA failure strings testers recorded for the Mercedes-Benz Slk. A check that finds nothing means the item is likely fine, not that the test is guaranteed.

Frequently Asked Questions: Mercedes-Benz Slk MOT & Reliability