Audi A5 vs Mercedes-Benz SL-Class
What's the difference?

Audi A5

$79,900 - $92,900

2026 price

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Mercedes-Benz SL-Class

—

2016 price

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Aston Martin Vanquish

Lamborghini Aventador

Lamborghini Huracan

Land Rover Discovery Sport

Mercedes-Benz A-Class

Mercedes-Benz C-Class

Mercedes-Benz CLA-Class

Mercedes-Benz CLA200

Mercedes-Benz CLS-Class

Mercedes-Benz E-Class

Mercedes-Benz E53

Mercedes-Benz GLA-Class

Mercedes-Benz GLA250

Mercedes-Benz GLC-Class

Mercedes-Benz S-Class

Mercedes-Benz SL-Class

Summary

2026 Audi A5

2016 Mercedes-Benz SL-Class

By Chris Thompson

By Peter Anderson

Safety Rating

Engine Type

Turbo 4, 2.0L

Turbo V8, 5.5L

Fuel Type

Premium Unleaded/Electric

Premium Unleaded Petrol

Fuel Efficiency

6.9L/100km (combined)

10.2L/100km (combined)

Seating

Likes

Stacked with techy features
Edition One value is hard to deny
Still a delight to drive

Amazing ride
Brilliant engine
Unparalleled presence

Dislikes

Loses some interior simplicity
Edition One not a permanent fixture
Having to wait for more variants

Price
Thirst
Weight

2026 Audi A5 Summary

The Audi A5 has done something naughty. It’s replaced the Audi A4.

Or at least that’s the case for now after the Ingolstadt brand made a bit of a mess of its naming strategy.

Essentially, the Audi A5 is now available as a sedan or a wagon, and the next A4 coming soon will be electric. The previous A5 was a swoopier two-door coupe or four-door gran coupe style model. So the A5 is now effectively Audi’s main BMW 3 Series or Mercedes C-Class and CLA rival.

Plus, the Audi S5 is also here to cater to performance car fans.

Can a new platform, a sleek, fresh look and a techy interior do the job?

We’ve been pedalling around the Victorian countryside in the hopes of finding out.

Stick with me, and I reckon we’ll get to the bottom of it. The question about the car, that is, not the bottom of Victoria.

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2016 Mercedes-Benz SL-Class Summary

Peter Anderson road tests and reviews the 2016 Mercedes-AMG SL63 with specs, fuel consumption and verdict.

Well. They don't make cars like this anymore, do they? Time was, a big coupe or convertible were de rigeur for the well-heeled banker, with 12 cylinders almost a given and fuel consumption measured in super tankers, or more likely just not talked about at all.

The world has changed but Mercedes’ SL hasn't. That's not strictly true, of course. The SL63 may drop four of the SL65's 12 cylinders, but at just half a litre smaller and still with twin-turbos it generates the enormous thrust a luxo-barge like this needs. The things that made it an icon are indeed still there - lots of tech, a style all its own and a name everyone recognises.

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Deep dive comparison

2026 Audi A5 2016 Mercedes-Benz SL-Class

Verdict

The Audi A5 remains a convincing option in the premium mid-size sedan category, even with the near-$10K price increase over its equivalent grade A4 predecessor.

Even in its base spec, it’s a lovely thing to drive and adds enough new kit to be a reasonable option when it comes to value. In terms of tech usability, it stands out from rivals. Practicality is still king for Audi.

But for the heart-over-head types, the S5 is fast and fun while remaining a comfortable cruiser and the price is decent. On a personal note, a six-cylinder wagon? That's a big yes from me.

For the time it’s available, it’s hard to go past the value on offer in the S5 Edition One. Getting an AWD V6 with that kind of capability for under $100K is something that's sure to tempt buyers. If it doesn’t, we need to take a good look at ourselves.

Note: CarsGuide attended this event as a guest of the manufacturer, with meals provided.

Verdict

The SL's overall score is somewhat skewed by everyday concerns, and rules are rules - an average punter will find the price of this car somewhat confusing and the devil-may-care attitude to fuel consumption bewildering.

If neither of these things are a problem, then the SL63 makes plenty of - well, not sense, because it's not a particularly clever or considered car - but it fills a niche that not so long ago we all thought would go the way of the dodo.

The fact it sells so few examples is betrayed by some of the cabin amenities and the fact that Mercedes hasn't put much effort into reducing the car's weight to improve its consumption or sharpen up the handling.

The fact it still exists at all is pretty damn cool, though, and for certain people an SL63 purchase is the culmination of a lot of hard work.

If it is your dream car, the SL63 won't disappoint. Everyone who rode with me said it was mightily impressive, but you've got to really want it. When you're not far off buying a Ferrari California T or Aston Martin V12 Vantage S for the money, you'll need a real yearning for the three-pointed star to go this way. And if you do, good luck to you - you've probably worked quite hard to get here.

Audi A5 vs Mercedes-Benz SL-Class What's the difference?

Summary

Deep dive comparison

Verdict

Verdict

Audi A5 vs Mercedes-Benz SL-Class
What's the difference?