BMW M8 vs Mercedes-Benz S-Class
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 BMW M8 starts from $377,000 before on-road costs, while the Mercedes-Benz S-Class opens at $278,900. That makes the Mercedes-Benz S-Class the more affordable entry point by $98,100.
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 $414,700 and $306,790 respectively.
Over 5 years, the running costs favour the Mercedes-Benz S-Class by roughly $3,990 in fuel alone.
Safety Rundown
Both the BMW M8 and Mercedes-Benz S-Class 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 6 in the BMW M8 and 9 in the Mercedes-Benz S-Class.
Feature Showdown
The BMW M8 features a 12.3-inch touchscreen, while the Mercedes-Benz S-Class gets a 12.8-inch display. Apple CarPlay and Android Auto are standard across both.
The BMW M8 stands out with power tailgate and Bowers & Wilkins audio that you will not find on the Mercedes-Benz S-Class. The Mercedes-Benz S-Class counters with Burmester audio. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The BMW M8 uses a Petrol producing 460kW and 750Nm of torque, sent through a auto to a AWD layout. It covers the 0-100km/h sprint in 5 seconds.
The Mercedes-Benz S-Class responds with a Petrol making 320kW and 520Nm, paired to a automatic driving all four wheels. It gets to 100km/h in 4.9 seconds.
The BMW M8 has the clear power advantage at 460kW vs 320kW. In the real-world sprint, the Mercedes-Benz S-Class is 0.1s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The BMW M8 measures 5,098mm long on a 3,027mm wheelbase, 81mm shorter than the Mercedes-Benz S-Class at 5,179mm (3,106mm wheelbase). The longer wheelbase on the Mercedes-Benz S-Class generally means more rear legroom.
Boot space is 420L in the BMW M8 and 510L in the Mercedes-Benz S-Class, giving the Mercedes-Benz S-Class a 90L advantage. The Mercedes-Benz S-Class seats 5 vs 4.
0Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.4m to 12.0m
Based on 11.4m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 12.0m 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 $3,278/year for the BMW M8 and $2,480/year for the Mercedes-Benz S-Class. That is a $798 annual difference in favour of the Mercedes-Benz S-Class.
Estimated annual total: $3,278 (BMW M8) vs $2,480 (Mercedes-Benz S-Class). The Mercedes-Benz S-Class saves you roughly $798 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (BMW M8) vs 5 years / 999,999km (Mercedes-Benz S-Class). Both match on warranty length.
Who Should Buy Which?
Buy the BMW M8 if: You prioritise performance, or prefer BMW's approach to design and ownership experience.
Buy the Mercedes-Benz S-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.
The Verdict
The Mercedes-Benz S-Class takes 5 of 6 key spec categories and comes in at a lower price. The Mercedes-Benz S-Class will save you roughly $798 a year in fuel. If boot space matters, the Mercedes-Benz S-Class has a clear edge. The best pick depends on what you value most. Explore the full specs for each model below.
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.
Published by CarSorted Editorial Team · 20 April 2026
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