Mercedes-Benz S-Class vs BMW XM
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 S-Class starts from $278,900 before on-road costs, while the BMW XM opens at $309,900. That makes the Mercedes-Benz S-Class the more affordable entry point by $31,000.
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 $306,790 and $340,890 respectively.
The BMW XM qualifies for FBT exemption as an electric vehicle, which can dramatically reduce the effective cost for novated lease buyers. The Mercedes-Benz S-Class, as a petrol model, does not qualify.
Over 5 years, the running costs favour the BMW XM by roughly $10,515 in fuel alone.
Safety Rundown
Both the Mercedes-Benz S-Class and BMW XM hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The BMW XM packs more ADAS features with 8 out of 10 key systems fitted, compared to 7 in the Mercedes-Benz S-Class.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control, a reversing camera. Airbag count is 9 in the Mercedes-Benz S-Class and 7 in the BMW XM.
Feature Showdown
The Mercedes-Benz S-Class features a 12.8-inch touchscreen, while the BMW XM gets a 14.9-inch display. Apple CarPlay and Android Auto are standard across both.
The Mercedes-Benz S-Class stands out with Burmester audio that you will not find on the BMW XM. The BMW XM counters with power tailgate and Bowers & Wilkins audio. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Mercedes-Benz S-Class uses a Petrol producing 320kW and 520Nm of torque, sent through a automatic to a AWD layout. It covers the 0-100km/h sprint in 4.9 seconds.
The BMW XM responds with a Plug-in Hybrid making 550kW and 800Nm, paired to a auto driving all four wheels. It gets to 100km/h in 4.3 seconds.
The BMW XM has the clear power advantage at 550kW vs 320kW. In the real-world sprint, the BMW XM is 0.6s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Mercedes-Benz S-Class measures 5,179mm long on a 3,106mm wheelbase, 69mm longer than the BMW XM at 5,110mm (3,105mm wheelbase). The longer wheelbase on the Mercedes-Benz S-Class generally means more rear legroom.
Boot space is 510L in the Mercedes-Benz S-Class and 500L in the BMW XM, giving the Mercedes-Benz S-Class a 10L advantage.
For towing, the BMW XM leads with a 2,700kg braked capacity vs 2,100kg. That 600kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.4m to 12.0m
Based on 12.0m 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 $2,679/year for the Mercedes-Benz S-Class and $576/year for the BMW XM. That is a $2,103 annual difference in favour of the BMW XM.
Estimated annual total: $2,679 (Mercedes-Benz S-Class) vs $576 (BMW XM). The BMW XM saves you roughly $2,103 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (Mercedes-Benz S-Class) vs 5 years / 999,999km (BMW XM). Both match on warranty length.
Who Should Buy Which?
Buy the Mercedes-Benz S-Class if: You want the lower entry price, need more boot space, or prefer Mercedes-Benz's approach to design and ownership experience.
Buy the BMW XM if: You prioritise performance, want lower running costs, need stronger towing, or prefer BMW's approach to design and ownership experience.
The Verdict
This is genuinely close. The Mercedes-Benz S-Class and BMW XM trade blows across the spec sheet, and neither runs away with an outright win. The BMW XM will save you roughly $2,103 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, Mercedes-Benz S-Class and BMW XM?
The Mercedes-Benz S-Class is the cheapest at $278,900 before on-road costs. That undercuts the BMW XM by $31,000.
Which is the most fuel-efficient?
The Mercedes-Benz S-Class uses the least fuel at 9.4L/100km on the combined cycle.
Which is safest?
They are evenly matched — Mercedes-Benz S-Class and BMW XM 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 S-Class has the largest boot at 510L.
Which can tow the most?
The BMW XM has the highest braked towing capacity at 2,700kg.
Which is the most powerful?
The BMW XM makes the most power at 550kW. The BMW XM is quickest to 100km/h in 4.3s.
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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