Used Vauxhall Astra K (2015–21) vs Mercedes-Benz A-Class W176 (2012–18)
Figures updated
Shopping for a used family hatchback? We compare the Vauxhall Astra K (2015–2021) and Mercedes-Benz A-Class W176 (2012–2018), which were on sale at the same time, on size, boot space, performance, safety and running costs, plus how cars of their age do in real MOT tests.
The short answer
The Mercedes-Benz A-Class W176 comes out ahead, with the better MOT record; the Vauxhall Astra K is close on everything else.
- The Mercedes-Benz A-Class W176 has the better MOT record for its age: the Mercedes-Benz A-Class W176 fails its MOT 5% less often than average for its age (24% of Mercedes-Benz A-Classes built 2012–2018 failed first time in 2024, against 25% of all cars that age), while the Vauxhall Astra K fails its MOT 7% more often than average for its age (23% of Vauxhall Astras built 2015–2021 failed first time in 2024, against 22% of all cars that age).
- Watch the exhaust and emissions on a Vauxhall Astra K: it fails on them 1.4 times as often as the average car.
- Watch the seat belts and airbags on a Mercedes-Benz A-Class W176: it fails on them 2.7 times as often as the average car.
| Figure | Vauxhall Astra KAstra K (2015–2021), 5-door hatchback | Mercedes-Benz A-Class W176W176 (2012–2018), 5-door hatchback |
|---|---|---|
| Price and practicality | ||
| Body | 5-door hatchback | 5-door hatchback |
| Seats | 5 | – |
| BootSeats up / folded | 370 litres / 1,210 | – |
| Length | 4,370mm | 4,292mm |
| WidthWithout mirrors | 1,809mm | 1,780mm |
| Height | 1,485mm | – |
| Performance | ||
| Power | 100–200 PS | – |
| Safety | ||
| Euro NCAP ratingTests get tougher each year | ★★★★★ (2015) | ★★★★★ (2012) |
| Economy and emissions | ||
| Fuel types | – | – |
| Official economyVersions of this generation | – | – |
| CO2 | – | – |
| Running costs at 7,500 miles a year | ||
| Cheapest version to fuelWhichever fuel costs least | – | – |
| Car tax, registered 2001 to 2017Taxed on CO2; newer cars pay a flat £200 | – | – |
| Reliability from real MOT tests | ||
| Reliability score | 99Average | 108Above average (best) |
| Failed first time, cars of this generation's ageUK rate for cars the same age in brackets | 23.4% (22.0%)built 2015–2021 | 23.5% (24.8%)built 2012–2018 (best) |
| Failed MOT first time (ages 3–20) | 33.8% | 21.4% (best) |
| Failed at 3 years old | 12.4% | 10.2% (best) |
| Failed at 5 years old | 17.9% | 15.0% (best) |
| Failed at 10 years old | 32.8% | 29.7% (best) |
| Most common MOT fault | Coil spring (5.1% of tests) | Tread depth (2.4% of tests) |
| Fails more than average on | Exhaust and emissions (1.4×) | Seat belts and airbags (2.7×) |
| MOT tests analysed | 624,660 | 341,498 |
| About the cars | ||
| Type | Family hatchback | Family hatchback |
| Owners' average miles a year | 8,000 | 8,500 |
| On sale | 2015–2021 | 2012–2018 |
Green marks the better figure where the difference is more than 3%. Reliability figures cover every version of each model tested in the year. Running costs use the typical official economy of recent versions (WLTP where available); real-world economy is usually a little worse for every car.
More comparisons
- Ford Focus Mk3 vs Vauxhall Astra K
- Volkswagen Golf Mk7 vs Vauxhall Astra K
- Vauxhall Astra K vs Audi A3 8V Sportback
- Vauxhall Astra K vs BMW 1 Series F20
- Ford Focus Mk3 vs Mercedes-Benz A-Class W176
- Volkswagen Golf Mk7 vs Mercedes-Benz A-Class W176
- Audi A3 8V Sportback vs Mercedes-Benz A-Class W176
- BMW 1 Series F20 vs Mercedes-Benz A-Class W176
Frequently asked questions
›Is a used Vauxhall Astra K or Mercedes-Benz A-Class W176 more reliable?
The Mercedes-Benz A-Class W176. Compared with all cars the same age, the Mercedes-Benz A-Class W176 fails its MOT 5% less often than average and the Vauxhall Astra K 7% more often than average (DVSA MOT tests, 2024). Because they're different ages, their raw rates differ: 23.5% of Mercedes-Benz A-Classes built 2012–2018 failed first time, and 23.4% of Vauxhall Astras built 2015–2021. Whatever you buy, check the MOT history of the exact car.
›Which is bigger, the Vauxhall Astra K or the Mercedes-Benz A-Class W176?
The Vauxhall Astra K is 78mm longer (4,370mm against 4,292mm).
›Which is safer, the Vauxhall Astra K or the Mercedes-Benz A-Class W176?
Euro NCAP gave the Vauxhall Astra K 5 stars (2015) and the Mercedes-Benz A-Class W176 5 stars (2012). Euro NCAP makes its tests tougher every few years, so ratings from different years aren't directly comparable.
›Should I buy the Vauxhall Astra K or the Mercedes-Benz A-Class W176?
The Mercedes-Benz A-Class W176 comes out ahead, with the better MOT record; the Vauxhall Astra K is close on everything else. The comparison above sets out price, space, performance, safety, running costs and reliability side by side.
Sources: manufacturers' UK specifications and price lists and Euro NCAP (listed on each model's page); DVSA anonymised MOT tests 2024 (Open Government Licence v3.0); Vehicle Certification Agency car fuel data, © Crown copyright, VCA cannot accept liability for its accuracy; fuel prices from the GOV.UK Fuel Finder scheme. Photos from Wikimedia Commons, credited under each picture.