Mercedes-Benz SL-Class vs Porsche Panamera
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.
Data checked: specs 28 Aug 2026, price 4 Jul 2026
Driver assistance, as the maker lists it
Swipe across. Tap a feature to see what it does and each car's source.
StandardOptional: printed price, +pack or NCO (no-cost)No, not offeredNo dataCounts beside each car use the same colours; ? is no option data.
From each manufacturer's Australian equipment list. No data means that car's document does not say. The drawings are our own illustrations of how each kind of system works.
$386,500RRP
- no option data for this car
$227,000RRP
- no option data for this car
Printed option prices only. A pack is counted once and makes the figure a floor when it carries no printed price. Nothing is inferred from the other car.
Track the Mercedes-Benz SL-Class & Porsche Panamera
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Price Breakdown
The Mercedes-Benz SL-Class starts from $386,500 before on-road costs, while the Porsche Panamera opens at $227,000. That makes the Porsche Panamera the more affordable entry point by $159,500.
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 $425,150 and $249,700 respectively.
Over 5 years, the running costs favour the Porsche Panamera by roughly $6,270 in fuel alone.
Safety Rundown
ANCAP safety ratings have not been published for both models yet. We will update this section when crash test results are available.
Recalls on our record
Mercedes-Benz SL-Class
- REC-003905 · published 20 Nov 2019The front passenger airbag may not have been sewn in accordance with the specifications.Year range on the notice: the notice prints no build range
Porsche Panamera
- REC-006455 · published 20 Oct 2025Due to a manufacturing issue, the wiring harness between the door pressure sensor and the airbag control unit has an incorrect connector pin allocation.Year range on the notice: 2023 - 2025
- REC-005728 · published 19 Jul 2023Due to a manufacturing issue, the screw connection to the rear seat belts may not have been tightened sufficiently.Year range on the notice: 2014 - 2023
- REC-001156 · published 26 Nov 2019There is potential for the 'brake pad worn' warning message to not be permanently displayed, resulting in the driver not being informed that the brake pads have worn out.Year range on the notice: 2016 - 2019
- 8 more on the model page.
A recall covers the builds its notice lists, not every car of a model. Check your VIN at vehiclerecalls.gov.au.
Feature Showdown
The Mercedes-Benz SL-Class features a 11.9-inch touchscreen paired with a 12.3-inch digital dash, while the Porsche Panamera gets a 12.3-inch display and 12.6-inch instruments. Apple CarPlay and Android Auto are standard across both.
The Mercedes-Benz SL-Class stands out with head-up display, wireless charging, panoramic roof and Burmester audio — features our data doesn't list for the Porsche Panamera. The Porsche Panamera counters with power tailgate. Which feature set matters more depends on your daily routine and priorities.
Interior trim differs: the Mercedes-Benz SL-Class gets nappa leather upholstery while the Porsche Panamera offers leather.
Drivetrain
The Mercedes-Benz SL-Class uses a Petrol producing 430kW and 800Nm of torque, sent through a automatic to a AWD layout. It covers the 0-100km/h sprint in 3.9 seconds.
The Porsche Panamera responds with a Petrol making 260kW and 500Nm, paired to a 8-speed pdk driving the rear wheels. It gets to 100km/h in 5.3 seconds.
The Mercedes-Benz SL-Class has the clear power advantage at 430kW vs 260kW. In the 0-100 sprint (manufacturer-claimed), the Mercedes-Benz SL-Class is 1.4s 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, 347mm shorter than the Porsche Panamera at 5,052mm (2,950mm wheelbase). The longer wheelbase on the Porsche Panamera generally means more rear legroom.
Boot space is 213L in the Mercedes-Benz SL-Class and 494L in the Porsche Panamera, giving the Porsche Panamera a 281L advantage. The Porsche Panamera seats 4 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
Compare U-turns side by side
Turning Circle · U-turn compare
kerb-to-kerb, 2 cars0 of 2 clear a 7.0 m street in one sweep
Green cars complete the U-turn; amber need a 3-point turn. Drag the slider to test tighter streets.
Standard widths: AU local streets ~5.5–7 m; main roads ~9–12 m.
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $3,962/year for the Mercedes-Benz SL-Class and $2,708/year for the Porsche Panamera. That is a $1,254 annual difference in favour of the Porsche Panamera.
Warranty: 5 years / 999,999km (Mercedes-Benz SL-Class) vs 3 years / 999,999km (Porsche Panamera). The Mercedes-Benz SL-Class has longer coverage.
Who Should Buy Which?
Buy the Mercedes-Benz SL-Class if: You prioritise performance, value a longer warranty, or prefer Mercedes-Benz's approach to design and ownership experience.
Buy the Porsche Panamera if: You want the lower entry price, need more boot space, want lower running costs, or prefer Porsche's approach to design and ownership experience.
The Verdict
Porsche Panamera: Top CarSorted Score, 56 vs 49
The Porsche Panamera comes out ahead on the CarSorted Score (56 vs 49), taking 3 of 6 key spec rows below and coming in at a lower price. The deciding gaps: fuel economy (Porsche Panamera ahead by 40), practicality (Porsche Panamera ahead by 26), performance (Mercedes-Benz SL-Class ahead by 17). The Porsche Panamera will save you roughly $1,254 a year in fuel. If boot space matters, the Porsche Panamera has a clear edge. The Mercedes-Benz SL-Class adds peace of mind with a longer 5-year warranty. The best pick depends on what you value most. Explore the full specs for each model below.
Common questions
Which is cheapest, Mercedes-Benz SL-Class and Porsche Panamera?
The Porsche Panamera is the cheapest at $227,000 before on-road costs. That undercuts the Mercedes-Benz SL-Class by $159,500.
Which is the most fuel-efficient?
The Porsche Panamera uses the least fuel at 9.5L/100km on the combined cycle.
What are the ANCAP safety ratings?
None of Mercedes-Benz SL-Class and Porsche Panamera carry a published ANCAP rating yet, so there is no crash result to compare. Check back as they are tested.
Which has the most boot space?
The Porsche Panamera has the largest boot at 494L with the seats up.
Which has the best warranty?
The Mercedes-Benz SL-Class has the longest warranty at 5 years / Unlimited.
Which is the most powerful?
The Mercedes-Benz SL-Class makes the most power at 430kW. The Mercedes-Benz SL-Class is quickest to 100km/h in 3.9s.
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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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