Mercedes Sl Tyre Pressures

Manufacturer-recommended front and rear pressures for every Sl tyre size and variant — in psi, bar or kPa.

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Wheel sizes
5
Model variants
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Find the right pressure for your Mercedes Sl

Not sure of your wheel size? It's the last number in the tyre size on your sidewall.

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How to check

Checking your Mercedes Sl tyre pressure

Two minutes at home or on a garage forecourt is all it takes.

Find your pressure

Look up your tyre size in the pressure chart, or check the sticker inside the driver's door jamb or fuel filler flap.

Check the tyres cold

Recommended figures are cold pressures — measure before driving, or at least a couple of hours after a journey.

Top up all four monthly

Check every tyre (and the spare) once a month and before long trips, then refit the valve caps securely.

Tyre Pressure Chart

Recommended pressures for your Mercedes Sl

Cold inflation pressures as recommended by Mercedes. Use the laden figures when the car is fully loaded with passengers or luggage.

Tyre sizeFrontFront (loaded)RearRear (loaded)
225/55 R16 95Y SL 30 – 32 psi2.1 – 2.2 bar207 – 221 kPa 39 psi2.7 bar269 kPa 35 – 37 psi2.4 – 2.6 bar241 – 255 kPa 46 psi3.2 bar317 kPa
225/55 R16 99Y SL 29 psi2.0 bar200 kPa 32 psi2.2 bar221 kPa 35 psi2.4 bar241 kPa 42 psi2.9 bar290 kPa
235/45 R17 93Y SL 32 psi2.2 bar221 kPa ––– 37 psi2.6 bar255 kPa –––
255/45 R17 98W SL 30 psi2.1 bar207 kPa 32 psi2.2 bar221 kPa 33 psi2.3 bar228 kPa 39 psi2.7 bar269 kPa
255/45 R17 98Y SL 32 psi2.2 bar221 kPa ––– 37 psi2.6 bar255 kPa –––
245/40 R18 96Y SL 32 psi2.2 bar221 kPa ––– 32 psi2.2 bar221 kPa –––
255/40 R18 95W SL 30 psi2.1 bar207 kPa 32 psi2.2 bar221 kPa ––– –––
255/40 R18 95Y SL 29 psi2.0 bar200 kPa ––– ––– –––
255/40 R18 95V SL SL 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa ––– –––
255/40 R18 99V SL SL 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
255/40 R18 95Y SL SL 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa ––– –––
255/40 R18 99Y SL SL 35 – 38 psi2.4 – 2.6 bar241 – 262 kPa 41 – 48 psi2.8 – 3.3 bar283 – 331 kPa 33 – 38 psi2.3 – 2.6 bar228 – 262 kPa 42 – 46 psi2.9 – 3.2 bar290 – 317 kPa
255/40 R18 95Y SL SL350 30 psi2.1 bar207 kPa 30 psi2.1 bar207 kPa ––– –––
255/40 R18 95V SL SL400 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa ––– –––
255/40 R18 99V SL SL400 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
255/40 R18 95Y SL SL400 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa ––– –––
255/40 R18 99Y SL SL400 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
255/40 R18 95Y SL SL55 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa ––– –––
285/35 R18 95W SL ––– ––– 33 psi2.3 bar228 kPa 39 psi2.7 bar269 kPa
285/35 R18 97W SL ––– ––– 33 psi2.3 bar228 kPa 39 psi2.7 bar269 kPa
285/35 R18 97Y SL ––– ––– 33 psi2.3 bar228 kPa –––
285/35 R18 101V SL SL ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
285/35 R18 97V SL SL ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
285/35 R18 97Y SL SL ––– ––– 33 psi2.3 bar228 kPa 46 psi3.2 bar317 kPa
285/35 R18 97Y SL SL350 ––– ––– 33 psi2.3 bar228 kPa –––
285/35 R18 101V SL SL400 ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
285/35 R18 97Y SL SL400 ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
285/35 R18 97W SL SL55 ––– ––– 36 psi2.5 bar248 kPa 41 psi2.8 bar283 kPa
245/35 R19 93W SL 31 psi2.1 bar214 kPa ––– ––– –––
245/35 R19 93W SL SL55 31 psi2.1 bar214 kPa ––– ––– –––
255/35 R19 96V SL 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R19 96Y SL 35 – 36 psi2.4 – 2.5 bar241 – 248 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R19 96V SL SL 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa ––– –––
255/35 R19 96Y SL SL 35 psi2.4 bar241 kPa 48 psi3.3 bar331 kPa ––– –––
255/35 R19 96Y SL SL350 36 psi2.5 bar248 kPa ––– ––– –––
255/35 R19 96Y SL SL400 38 psi2.6 bar262 kPa 41 psi2.8 bar283 kPa ––– –––
255/35 R19 96V SL SL55 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R19 96Y SL SL55 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/30 R19 93W SL ––– ––– 34 psi2.3 bar234 kPa –––
275/30 R19 93W SL SL55 ––– ––– 34 psi2.3 bar234 kPa –––
285/30 R19 98Y SL ––– ––– 38 psi2.6 bar262 kPa –––
285/30 R19 98V SL SL ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
285/30 R19 98Y SL SL ––– ––– 33 psi2.3 bar228 kPa 46 psi3.2 bar317 kPa
285/30 R19 98Y SL SL350 ––– ––– 38 psi2.6 bar262 kPa –––
285/30 R19 98Y SL SL400 ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
255/30 R20 96Y SL 36 psi2.5 bar248 kPa ––– ––– –––
255/30 R20 97Y SL 31 psi2.1 bar214 kPa ––– ––– –––
255/30 R20 96Y SL SL350 36 psi2.5 bar248 kPa ––– ––– –––
255/30 R20 97Y SL SL55 31 psi2.1 bar214 kPa ––– ––– –––
275/30 R20 100Y SL ––– ––– 33 psi2.3 bar228 kPa –––
275/30 R20 97Y SL ––– ––– 34 psi2.3 bar234 kPa –––
275/30 R20 97Y SL SL55 ––– ––– 34 psi2.3 bar234 kPa –––
295/25 R20 98Y SL ––– ––– 38 psi2.6 bar262 kPa –––
295/25 R20 98Y SL SL350 ––– ––– 38 psi2.6 bar262 kPa –––

Always double-check against the tyre placard inside the driver's door or your Mercedes handbook — pressures can vary by exact specification and year.

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Why it matters

The right pressure pays for itself

Tyres naturally lose around 1–2 psi a month, and more in cold weather — so even careful drivers end up under-inflated. Running your Sl below Mercedes's recommended pressure increases rolling resistance, which means more fuel burned, faster shoulder wear and longer braking distances in the wet.

Over-inflating isn't the answer either: too much air shrinks the tyre's contact patch, wearing the centre of the tread and making grip and ride quality worse. The recommended figures in the chart are the sweet spot — and if you're carrying a full load of passengers or luggage, switch to the laden values before you set off.

How pressure shapes your grip on the road

Under-inflated Only the shoulders touch — vague steering, extra fuel, hot edges
Correct pressure Full, even contact — best grip, wear and fuel economy
Over-inflated Just the centre grips — harsher ride, faster middle wear

The red zones are where a mis-inflated tyre carries the load — and where it wears out first.

Help & Advice

Tyre pressure questions, answered

What tyre pressure should a Mercedes Sl be?
It depends on your tyre size and variant — most Sl fitments sit roughly between 30 and 38 psi (about 2.1–2.6 bar). Use the chart on this page to find your exact size, and confirm against the sticker inside the driver's door jamb or your handbook.
Where do I find the recommended pressure on the car?
Most Mercedes models have a tyre placard inside the driver's door jamb; some print it inside the fuel filler flap or glovebox lid. It lists front and rear pressures for each approved tyre size, including fully-laden figures. The owner's handbook has the same table.
When should I use the laden pressures?
Use the laden (loaded) figures when the car is carrying close to a full load — four or five occupants, a packed boot, or towing. The extra pressure supports the added weight and keeps the car stable. Drop back to the normal figures once you've unloaded.
What's the difference between psi, bar and kPa?
They're just different units for the same pressure. UK forecourt gauges usually read psi (pounds per square inch), European handbooks often quote bar, and kPa (kilopascals) appears on many door stickers. 1 bar = 14.5 psi = 100 kPa — or simply switch units on the pressure chart.
How often should I check my tyre pressures?
Once a month, and always before a long journey or when loading the car up. Tyres lose air naturally, and a visual glance won't spot a few psi missing. Check them cold, and if one tyre keeps losing pressure faster than the rest, have it inspected — it may have a slow puncture.
Still stuck? Chat with our team — we're happy to help. 🙂

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