CUPRA Formentor vs Mercedes-Benz GLB
A detailed look at how two of Australia's most popular SUVs 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.
Price Breakdown
The CUPRA Formentor starts from $54,990 before on-road costs, while the Mercedes-Benz GLB opens at $63,900. That makes the CUPRA Formentor the more affordable entry point by $8,910.
Once you factor in stamp duty, registration, CTP insurance, and dealer delivery, expect to add roughly 8-12% on top of the RRP depending on your state. That puts estimated driveaway prices in the ballpark of $60,489 and $70,290 respectively.
Over 5 years, the running costs are nearly identical since both have similar efficiency.
Safety Rundown
Both the CUPRA Formentor and Mercedes-Benz GLB hold a 5-star ANCAP safety rating. Adult occupant protection scored 93% for the CUPRA Formentor and 92% for the Mercedes-Benz GLB.
Where the two diverge is in active safety technology. The CUPRA Formentor packs more ADAS features with 8 out of 10 key systems fitted, compared to 6 in the Mercedes-Benz GLB.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control, a reversing camera. Airbag count is 7 in the CUPRA Formentor and 7 in the Mercedes-Benz GLB.
Feature Showdown
The CUPRA Formentor features a 12.9-inch touchscreen paired with a 10.3-inch digital dash, while the Mercedes-Benz GLB gets a 10.3-inch display. Apple CarPlay and Android Auto are standard across both.
Drivetrain
The CUPRA Formentor uses a 4-cyl Turbo Petrol producing 140kW and 320Nm of torque, sent through a automatic to a AWD layout. It covers the 0-100km/h sprint in 7 seconds.
The Mercedes-Benz GLB responds with a Petrol making 120kW and 250Nm, paired to a automatic driving the front wheels. It gets to 100km/h in 9.4 seconds.
The CUPRA Formentor has the clear power advantage at 140kW vs 120kW. In the real-world sprint, the CUPRA Formentor is 2.4s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The CUPRA Formentor measures 4,450mm long on a 2,680mm wheelbase, 184mm shorter than the Mercedes-Benz GLB at 4,634mm (2,829mm wheelbase). The longer wheelbase on the Mercedes-Benz GLB generally means more rear legroom.
Boot space is 420L in the CUPRA Formentor and 570L in the Mercedes-Benz GLB, giving the Mercedes-Benz GLB a 150L advantage. The Mercedes-Benz GLB seats 7 vs 5.
For towing, the CUPRA Formentor leads with a 1,700kg braked capacity vs 1,600kg. That 100kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
10.7m to 11.6m
Based on 10.7m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 11.6m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $1,995/year for the CUPRA Formentor and $1,853/year for the Mercedes-Benz GLB. That is a $142 annual difference in favour of the Mercedes-Benz GLB.
Estimated annual total: $1,995 (CUPRA Formentor) vs $1,853 (Mercedes-Benz GLB). The Mercedes-Benz GLB saves you roughly $142 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (CUPRA Formentor) vs 5 years / 999,999km (Mercedes-Benz GLB). Both match on warranty length.
Who Should Buy Which?
Buy the CUPRA Formentor if: You want the lower entry price, prioritise performance, need stronger towing, or prefer CUPRA's approach to design and ownership experience.
Buy the Mercedes-Benz GLB if: You need more boot space, want lower running costs, or prefer Mercedes-Benz's approach to design and ownership experience.
The Verdict
The CUPRA Formentor takes 4 of 6 key spec categories and comes in at a lower price. The Mercedes-Benz GLB will save you roughly $142 a year in fuel. If boot space matters, the Mercedes-Benz GLB has a clear edge. The best pick depends on what you value most. Explore the full specs for each model below.
Common questions
Which is cheapest, CUPRA Formentor and Mercedes-Benz GLB?
The CUPRA Formentor is the cheapest at $54,990 before on-road costs. That undercuts the Mercedes-Benz GLB by $8,910.
Which is the most fuel-efficient?
The Mercedes-Benz GLB uses the least fuel at 6.5L/100km on the combined cycle.
Which is safest?
They are evenly matched — CUPRA Formentor and Mercedes-Benz GLB all hold a 5-star ANCAP rating. Compare the active-safety features above to separate them.
Which has the most boot space?
The Mercedes-Benz GLB has the largest boot at 570L.
Which can tow the most?
The CUPRA Formentor has the highest braked towing capacity at 1,700kg.
Which is the most powerful?
The CUPRA Formentor makes the most power at 140kW. The CUPRA Formentor is quickest to 100km/h in 7s.
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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