Mercedes-Benz SL-Class vs BMW M5
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 SL-Class starts from $239,900 before on-road costs, while the BMW M5 opens at $259,900. That makes the Mercedes-Benz SL-Class the more affordable entry point by $20,000.
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 $263,890 and $285,890 respectively.
The BMW M5 qualifies for FBT exemption as an electric vehicle, which can dramatically reduce the effective cost for novated lease buyers. The Mercedes-Benz SL-Class, as a petrol model, does not qualify.
Over 5 years, the running costs favour the BMW M5 by roughly $10,400 in fuel alone.
Safety Rundown
Both the Mercedes-Benz SL-Class and BMW M5 hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The BMW M5 packs more ADAS features with 7 out of 10 key systems fitted, compared to 6 in the Mercedes-Benz SL-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 SL-Class and 6 in the BMW M5. The BMW M5 adds a 360-degree camera that the Mercedes-Benz SL-Class misses.
Feature Showdown
The Mercedes-Benz SL-Class features a 11.9-inch touchscreen, while the BMW M5 gets a 14.9-inch display. Apple CarPlay and Android Auto are standard across both.
The Mercedes-Benz SL-Class stands out with Burmester audio that you will not find on the BMW M5. The BMW M5 counters with ventilated seats, power tailgate and Bowers & Wilkins audio. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Mercedes-Benz SL-Class uses a Petrol producing 220kW and 400Nm of torque, sent through a automatic to a RWD layout. It covers the 0-100km/h sprint in 5.1 seconds.
The BMW M5 responds with a Plug-in Hybrid making 535kW and 1000Nm, paired to a auto driving all four wheels. It gets to 100km/h in 3.5 seconds.
The BMW M5 has the clear power advantage at 535kW vs 220kW. In the real-world sprint, the BMW M5 is 1.6s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Mercedes-Benz SL-Class measures 4,705mm long on a 2,700mm wheelbase, 391mm shorter than the BMW M5 at 5,096mm (3,006mm wheelbase). The longer wheelbase on the BMW M5 generally means more rear legroom.
Boot space is 213L in the Mercedes-Benz SL-Class and 530L in the BMW M5, giving the BMW M5 a 317L advantage. The BMW M5 seats 5 vs 2.
0Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.6m to 11.9m
Based on 11.6m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 11.9m 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 $2,565/year for the Mercedes-Benz SL-Class and $485/year for the BMW M5. That is a $2,080 annual difference in favour of the BMW M5.
Estimated annual total: $2,565 (Mercedes-Benz SL-Class) vs $485 (BMW M5). The BMW M5 saves you roughly $2,080 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (Mercedes-Benz SL-Class) vs 5 years / 999,999km (BMW M5). Both match on warranty length.
Who Should Buy Which?
Buy the Mercedes-Benz SL-Class if: You want the lower entry price, or prefer Mercedes-Benz's approach to design and ownership experience.
Buy the BMW M5 if: You prioritise performance, need more boot space, want lower running costs, or prefer BMW's approach to design and ownership experience.
The Verdict
The BMW M5 takes 4 of 6 key spec categories. The BMW M5 will save you roughly $2,080 a year in fuel. If boot space matters, the BMW M5 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
Comments (0)
Sign in to join the conversation
No comments yet. Be the first!
