Mazda Mazda3 vs Mercedes-Benz B-Class
A detailed look at how two of Australia's most popular Hatchbacks compare on price, running costs, safety, and everyday livability.
Specifications and pricing correct at time of publishing. Prices are RRP before on-road costs unless stated otherwise. Always confirm with the manufacturer or dealer before purchasing.
Data checked: specs 12 Sep 2026, price 24 Jun 2026
Driver assistance, as the maker lists it
Swipe across. Tap a feature to see what it does and each car's source.
StandardOptional: printed price, +pack or NCO (no-cost)No, not offeredNo dataCounts beside each car use the same colours; ? is no option data.
From each manufacturer's Australian equipment list. No data means that car's document does not say. The drawings are our own illustrations of how each kind of system works.
Mercedes-Benz B-Class: we're still completing price, length, width, height and wheelbase, plus 8 others.
A blank cell below means we don't have that figure, not that the car scores badly on it. We leave them empty rather than estimate, so any row where one car is blank isn't a like-for-like comparison yet.
$26,490RRP
- no option data for this car
No price
- no option data for this car
Printed option prices only. A pack is counted once and makes the figure a floor when it carries no printed price. Nothing is inferred from the other car.
Track the Mazda Mazda3 & Mercedes-Benz B-Class
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Price Breakdown
Pricing for one or both models is yet to be confirmed for the Australian market. We will update this comparison when official RRPs are announced.
Safety Rundown
ANCAP safety ratings have not been published for both models yet. We will update this section when crash test results are available.
Recalls on our record
Mazda Mazda3
- REC-005733 · published 1 Aug 2023Due to a manufacturing defect, the rear-view camera wiring harness may become damaged and could cause the rear-view image to become distorted or flicker.Year range on the notice: 2013 - 2020
- REC-005009 · published 2 Dec 2021The low pressure fuel pump impeller may become deformed and cause the fuel pump to stop working.Year range on the notice: 2017 - 2019
- REC-000896 · published 9 Jan 2020The Smart Brake Support (SBS) system may falsely detect an object in front of the vehicle, which may initiate the automatic brake function.Year range on the notice: 2019
- 10 more on the model page.
Mercedes-Benz B-Class
- REC-006695 · published 12 Aug 2026Nine model lines: door lock defect (campaign RC5219)Year range on the notice: 2018 - 2026
- REC-005401 · published 6 Apr 2022Due to a software issue, the automatic network search of the emergency call system (eCall) communication module may be deactivated.Year range on the notice: 2018 - 2020
- REC-004979 · published 21 Oct 2021Due to a software issue, the automatic network search of the emergency call system (eCall) communication module may be deactivated.Year range on the notice: 2018 - 2020
- 9 more on the model page.
A recall covers the builds its notice lists, not every car of a model. Check your VIN at vehiclerecalls.gov.au.
Feature Showdown
Both come with modern infotainment systems.
The Mazda Mazda3 stands out with Apple CarPlay and head-up display — features our data doesn't list for the Mercedes-Benz B-Class. The Mercedes-Benz B-Class counters with heated front seats. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Mazda Mazda3 uses a 2.0 litre in-line 4 cylinder 16 valve DOHC S-VT petrol with i-stop and cylinder deactivation producing 114kW and 200Nm of torque, sent through a 6-speed automatic (skyactiv-drive) to a FWD layout.
The Mercedes-Benz B-Class lines up making 80kW and 250Nm, paired to a autotronic cvt driving the front wheels.
The Mazda Mazda3 has the clear power advantage at 114kW vs 80kW. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
10.6m diameter
Good
Based on 10.6m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
Interactive simulator: U-turns, parking & towing
Turning Circle
Kerb-to-kerb diameter. Smaller turns are easier in tight carparks and U-turns.
Good
Needs a 3-point turn (one reverse)
Needs about 9.2 m to swing round without stopping. Road is 9.0 m.
U-turn on a wide street
≥ 10 m: clears in one
U-turn on a standard street
7 m: 3-point turn
Standard parking bay
1.8 m wide: fits with room
Tight carpark aisle
6 m: swings in
Narrow laneway
3.5 m: no room to turn
Turning circle ratings
Standard widths: AU local streets carry ~5.5–7 m of carriageway; main roads ~9–12 m. AS 2890.1 carpark aisles are ~5.8–6.6 m for 90° bays (2.6 m wide × 5.4 m deep).
Road, aisle, swing and off-tracking figures are indicative estimates from the published turning circle. Verify in person before relying on them.
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $1,682/year for the Mazda Mazda3 and $1,596/year for the Mercedes-Benz B-Class. That is a $86 annual difference in favour of the Mercedes-Benz B-Class.
Who Should Buy Which?
Buy the Mazda Mazda3 if: You prioritise performance, or prefer Mazda's approach to design and ownership experience.
Buy the Mercedes-Benz B-Class if: You want lower running costs, or prefer Mercedes-Benz's approach to design and ownership experience.
The Verdict
The CarSorted Score calls this a draw (73 vs 53). The Mazda Mazda3 and Mercedes-Benz B-Class trade blows across the spec sheet, and neither runs away with an outright win. The Mercedes-Benz B-Class will save you roughly $86 a year in fuel. The best pick depends on what you value most. Explore the full specs for each model below.
Common questions
Which is cheapest, Mazda Mazda3 and Mercedes-Benz B-Class?
The Mazda Mazda3 is the cheapest at $26,490 before on-road costs.
Which is the most fuel-efficient?
The Mercedes-Benz B-Class uses the least fuel at 5.6L/100km on the combined cycle.
What are the ANCAP safety ratings?
Mercedes-Benz B-Class holds a 5-star ANCAP rating. We have no published ANCAP rating for Mazda Mazda3, so there is nothing to compare on crash performance. Compare the active-safety features above instead.
Which can tow the most?
The Mazda Mazda3 has the highest braked towing capacity at 1,200kg.
Which is the most powerful?
The Mazda Mazda3 makes the most power at 114kW.
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Disclaimer: All information in this comparison was believed to be correct at the time of publishing (20 April 2026). Prices are manufacturer recommended retail prices (RRP) and may vary by state, dealer, and options. Driveaway costs include estimated on-road costs for Victoria. Fuel economy figures are WLTP/ADR combined cycle. Specifications can change without notice. Always verify with the manufacturer before making a purchase decision. CarSorted does not accept payment for recommendations.
Auto-generated from CarSorted's specification data · 20 April 2026
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