Mercedes-Benz GLS-Class vs BMW M8
A detailed look at how two of Australia's most popular cars 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 Mercedes-Benz GLS-Class starts from $199,900 before on-road costs, while the BMW M8 opens at $377,000. That makes the Mercedes-Benz GLS-Class the more affordable entry point by $177,100.
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 $219,890 and $414,700 respectively.
Over 5 years, the running costs favour the Mercedes-Benz GLS-Class by roughly $1,425 in fuel alone.
Safety Rundown
Both the Mercedes-Benz GLS-Class and BMW M8 hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. Both models are evenly matched with 7 out of 10 key ADAS systems.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control, a reversing camera. Airbag count is 9 in the Mercedes-Benz GLS-Class and 6 in the BMW M8.
Feature Showdown
The Mercedes-Benz GLS-Class features a 12.3-inch touchscreen, while the BMW M8 gets a 12.3-inch display. Apple CarPlay and Android Auto are standard across both.
The Mercedes-Benz GLS-Class stands out with Burmester audio that you will not find on the BMW M8. The BMW M8 counters with heated front seats, ventilated seats and Bowers & Wilkins audio. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Mercedes-Benz GLS-Class uses a Petrol producing 270kW and 500Nm of torque, sent through a automatic to a AWD layout. It covers the 0-100km/h sprint in 5.9 seconds.
The BMW M8 responds with a Petrol making 460kW and 750Nm, paired to a auto driving all four wheels. It gets to 100km/h in 5 seconds.
The BMW M8 has the clear power advantage at 460kW vs 270kW. In the real-world sprint, the BMW M8 is 0.9s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Mercedes-Benz GLS-Class measures 5,207mm long on a 3,135mm wheelbase, 109mm longer than the BMW M8 at 5,098mm (3,027mm wheelbase). The longer wheelbase on the Mercedes-Benz GLS-Class generally means more rear legroom.
Boot space is 680L in the Mercedes-Benz GLS-Class and 420L in the BMW M8, giving the Mercedes-Benz GLS-Class a 260L advantage. The Mercedes-Benz GLS-Class seats 7 vs 4.
0Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.4m to 12.8m
Based on 12.8m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 11.4m 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 $2,993/year for the Mercedes-Benz GLS-Class and $3,278/year for the BMW M8. That is a $285 annual difference in favour of the Mercedes-Benz GLS-Class.
Estimated annual total: $2,993 (Mercedes-Benz GLS-Class) vs $3,278 (BMW M8). The Mercedes-Benz GLS-Class saves you roughly $285 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (Mercedes-Benz GLS-Class) vs 5 years / 999,999km (BMW M8). Both match on warranty length.
Who Should Buy Which?
Buy the Mercedes-Benz GLS-Class if: You want the lower entry price, need more boot space, want lower running costs, or prefer Mercedes-Benz's approach to design and ownership experience.
Buy the BMW M8 if: You prioritise performance, or prefer BMW's approach to design and ownership experience.
The Verdict
The Mercedes-Benz GLS-Class takes 4 of 6 key spec categories and comes in at a lower price. The Mercedes-Benz GLS-Class will save you roughly $285 a year in fuel. If boot space matters, the Mercedes-Benz GLS-Class 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, Mercedes-Benz GLS-Class and BMW M8?
The Mercedes-Benz GLS-Class is the cheapest at $199,900 before on-road costs. That undercuts the BMW M8 by $177,100.
Which is the most fuel-efficient?
The Mercedes-Benz GLS-Class uses the least fuel at 10.5L/100km on the combined cycle.
Which is safest?
They are evenly matched — Mercedes-Benz GLS-Class and BMW M8 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 GLS-Class has the largest boot at 680L.
Which can tow the most?
The Mercedes-Benz GLS-Class has the highest braked towing capacity at 3,500kg.
Which is the most powerful?
The BMW M8 makes the most power at 460kW. The BMW M8 is quickest to 100km/h in 5s.
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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