Parkers overall rating: 4.2 out of 5 4.2

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 7.5 - 10.4 mpp
Diesel engines 11.4 - 13.0 mpp
Plug-in hybrid petrol engines 54.8 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.
Based on "Weighted" mpg; figures depend on the proportion of miles driven in pure electric mode and may vary widely

Fuel economy

Petrol engines 34.9 - 48.7 mpg
Diesel engines 56.5 - 64.2 mpg
Plug-in hybrid petrol engines 256.8 mpg
  • Petrol, diesel and plug-in hybrid versions available
  • PHEV A 250 e has a 42-mile range
  • All models are economical and efficient

Fuel consumption is one area where the A-Class Saloon excels, with every model on offer regardless of fuel type beating 45mpg on the Combined WLTP 'real world' testing regime.

Fuel consumption for each version on the largest wheels:

  • A 180 – 54.3mpg (manual or auto)
  • A 200 – 54.3mpg (manual or auto)
  • A 250 – 47.9mpg (auto only)
  • A 250e – 217.3mpg
  • A 180 d – 70.6mpg (manual)
  • A 180 d auto – 74.3mpg
  • A 200 d auto – 68.9mpg
  • A 220 d auto – 68.9mpg

If you're buying purely on fuel consumption, then the diesel version looks good, while the new PHEV A 250 e looks astonishing economical. Like all plug-in hybrids, it flatters to deceive somewhat, with the battery only influencing the fuel consumption while there's charge in it. Good news is for electric-only fans, it will will travel 42 miles on battery only, making this the one to have for those with a commute to accommodate, and a suitable chargepoint.

In terms of CO2 emissions, there’s not a huge divergence across the majority of the regular range. Here’s what Mercedes-Benz claims (we've taken the CO2 figure for the cars with the largest wheel sizes):

  • A 180 – 120g/km
  • A 200 – 120g/km
  • A 250 – 134g/km
  • A 250e – 31g/km
  • A 180 d – 105g/km
  • A 180 d auto – 100g/km
  • A 200 d auto – 108g/km
  • A 220 d auto – 109g/km

Mercedes-Benz A250 boot badge

Is it reliable?

  • The A-Class Saloon is all-new
  • Average reliability for old A-Class
  • Feels solid and well-put together, though

Like the Mercedes-Benz A-Class Hatchback, the A-Class Saloon is an all-new car, so it’s hard to say exactly how reliable it will be longer-term until we've seen a few in service and in use over a longer period.

There were several recalls for the previous-generation car, although this isn’t a solid marker for reliability, more how proactive the manufacturer is about fixing minor issues. That car had an average reliability record, and Mercedes-Benz will be aiming for an improvement with this car. The three-year, 60,000-mile warranty will add a bit of peace of mind for those first owners, though.

Mercedes-Benz A-Class Saloon (2020) instruments

Ongoing running costs

Road tax (12 months) £140 - £475
Insurance group 16 - 37
How much is it to insure?