Mercedes Benz S 350 L Grand Ed Executive D A (2020)
2020 Mercedes Benz S 350 L Grand Ed Executive D A
CarHunch analysed 333 real MOT records for the 2020 Mercedes Benz S 350 L Grand Ed Executive D A. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2020 Mercedes-Benz S 350 L beats the UK average with an 86.1% first-time pass rate, suggesting this diesel executive sedan is holding up well in its fifth year. However, 17.7% of these vehicles have recorded a dangerous defect at some point, which is worth noting if you're buying used—request the full MOT history and have any historical faults independently inspected.
At just under 50,000 miles on average, these cars are running low mileage for their age, which generally favours reliability. The typical vehicle racks up 0.34 failures and 2.2 advisories per test, indicating minor wear rather than systemic problems—but before purchase, have a pre-buy inspection focus on the diesel particulate filter and suspension components, which are common cost areas on high-mileage luxury diesels.
What to check before buying a 2020 Mercedes Benz S 350 L Grand Ed Executive D A
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Mercedes Benz S 350 L Grand Ed Executive D A
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2020 Mercedes Benz S 350 L Grand Ed Executive D A vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2020 Mercedes Benz S 350 L Grand Ed Executive D A vehicles fall between 31,356 and 63,177 miles.
2020 Mercedes Benz S 350 L Grand Ed Executive D A — Still on the Road
Strong survival — 289 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 2021–2025.
MOT History Averages
Found a specific Mercedes Benz S 350 L Grand Ed Executive D A?
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