Mercedes Benz Cls (2020)
2020 Mercedes Benz Cls
CarHunch analysed 279 real MOT records for the 2020 Mercedes Benz Cls.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2020 Mercedes-Benz CLS passes its MOT first time at 85.5%, which is comfortably above the UK average of 80%, suggesting solid baseline reliability—but the uncomfortable truth is that 40.9% of these cars have recorded a dangerous defect at some point, which is well above typical and should give serious pause to any buyer. The diesel-dominated fleet (227 of 279 vehicles) achieves an 84.8% pass rate, indicating the engine choice is handling age and mileage reasonably well.
At just over 31,000 miles median, these four-year-olds are running lower than expected, which means many haven't yet accumulated the stress that reveals hidden problems. The 0.66 average failures and 2.0 advisories per vehicle suggest wear is emerging in areas like suspension and brake components rather than catastrophic mechanical breakdown, so have a pre-purchase inspection focus on those systems and dig into the full MOT history for any pattern of dangerous defects before committing.
We have limited data for the 2020 Mercedes Benz Cls — treat the figures below as indicative rather than definitive.
These stats describe 279 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
What tends to go wrong
Across 279 vehicles — figures show how many had each issue flagged at least once in their MOT history.
Data covers a 3-year window centred on 2020.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 279 Mercedes Benz Cls cars.
Before you buy a 2020 Mercedes Benz Cls
Based on MOT data from 279 vehicles — here's what to check.
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Check the full MOT history.
40.9% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (81%) | 227 | 84.8% | 0.7 |
Colour Breakdown
Based on 34,383 Mercedes Benz Cls vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2020 Mercedes Benz Cls vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2020 Mercedes Benz Cls vehicles fall between 25,168 and 44,998 miles.
2020 Mercedes Benz Cls — Still on the Road
Almost all 2020 Mercedes Benz Clss are still on the road.
Strong survival — 262 vehicles still getting MOTs in 2025, 98% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.
MOT History Averages
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Compare with another model
See how the 2020 Mercedes Benz Cls stacks up against a rival.