Mercedes-Benz · ML 55 AMG · Front

Mercedes-Benz ML 55 AMG front tyres: 32-35 psi / 2.2-2.4 bar

Drivetrain: rear-wheel drive
Body: passenger car
PSI F / R: 32-35 / 32-35
Bar F / R: 2.2-2.4 / 2.2-2.4

psi front

2.31 bar · 231 kPa at the steering axle

32-35 psi F · 32-35 psi R · 2.2-2.4 / 2.2-2.4 bar · 231/231 kPa

A 3 psi miss on one front corner of this ML 55 AMG shows up as a wander before the TPMS lamp bothers you. Target 34 psi (2.31 bar) cold. Under-inflation cooks the shoulders of a ML 55 AMG; over-inflation wears the centre rib and bangs every cat’s eye.

Mercedes-Benz ML 55 AMG placard versus sidewall

Sidewall PSI is a carcass maximum. Recommended operating pressure for this ML 55 AMG is the pillar sticker, near 34/34 psi.

Estimated pressure by tyre size (235/35R19 and others)

Planning cold pressures for sizes often seen on a passenger car. This ML 55 AMG sample opens with 235/35R19, then 275/35R18 and 245/40R18.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
235/35R19	36	—	2.48	—	248	—	Front 19-inch
275/35R18	36	—	2.48	—	248	—	Wide rear
245/40R18	35	—	2.41	—	241	—	Square-ish sport
255/40R17	35	—	2.41	—	241	—	Rear stagger 17-inch
275/30R19	36	—	2.48	—	248	—	Rear 19-inch
225/45R17	34	—	2.34	—	234	—	Front sport size
255/35R18	35	—	2.41	—	241	—	Rear stagger 18-inch
225/40R18	35	—	2.41	—	241	—	Front 18-inch

Pressure against load

Load moves the rear of a passenger car first. If the factory placard already has a “laden” column, use that instead of these sketches.

Condition	Front (est.)	Rear (est.)
Driver only	34 psi / 2.34 bar	34 psi / 2.34 bar
Full occupancy	35 psi / 2.41 bar	36 psi / 2.48 bar
Motorway + luggage	36 psi / 2.48 bar	37 psi / 2.55 bar

Steering feel on the ML 55 AMG lives on this axle. Do not drop front pressure to “soften” a plus-size 245/40R18; you will roll the sidewall in a roundabout.

How to set the ML 55 AMG

Measure before the school run, not after the M25.
Write LF / RF / RR / RL. Do not keep ML 55 AMG numbers in your head.
Add air in short bursts toward 34 psi (2.31 bar) front and 34 psi rear.
If one corner is 4 psi down, hunt for a nail before you blame the weather.
Log date, ambient temperature and the four readings.

PSI, bar and kPa

PSI-led conversions for the Mercedes-Benz ML 55 AMG band (32-35 / 32-35).

PSI	Bar	kPa
30	2.07	207
32	2.21	221
33	2.28	228
33.5	2.31	231
35	2.41	241
36	2.48	248
38	2.62	262
40	2.76	276
44	3.03	303
50	3.45	345
60	4.14	414

Temperature drift

Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for this ML 55 AMG.

Ambient	Gauge (front mid)	Bar	kPa	Note
−5 °C (hard frost)	31 psi	2.14 bar	214 kPa	Gauge reads low; do not overfill once warm
0 °C	32 psi	2.21 bar	221 kPa	Gauge reads low; do not overfill once warm
8 °C (UK winter morning)	33 psi	2.28 bar	228 kPa	Gauge reads low; do not overfill once warm
20 °C (set cold here)	34 psi	2.34 bar	234 kPa	Baseline
30 °C	36 psi	2.48 bar	248 kPa	Do not bleed a hot tyre
38 °C (heatwave tarmac)	37 psi	2.55 bar	255 kPa	Do not bleed a hot tyre

Mercedes-Benz notes

Mercedes often lists comfort versus load. Match the table to how the ML 55 AMG is actually occupied that day.

Spare and inflator kit

A matching full-size spare on the Mercedes-Benz ML 55 AMG usually follows the higher axle (often the rear, near 32-35 psi). A space-saver is commonly 60 psi / 4.1 bar — read that tyre’s own sidewall. An inflator kit is not a spare; check the sealant date.

Keep the Mercedes-Benz ML 55 AMG on the printed band; use 235/35R19 and 245/40R18 only as a map for non-OEM wheels.

Other Mercedes-Benz models

200 380 560 280 230 190 308 170

Questions about this ML 55 AMG

What is that in bar and kPa for the ML 55 AMG?

Mid-points are about 2.31 bar (231 kPa) front and 2.31 bar (231 kPa) rear.

When does TPMS warn on a Mercedes-Benz ML 55 AMG?

Direct TPMS typically flags about 25% below placard — near 25 psi on this row. Fill to the sticker, not to the lamp.

Front versus rear on the Mercedes-Benz ML 55 AMG?

This row is 32-35 F / 32-35 R. Even when they match, a laden rear can justify a higher number if the sticker prints one.

Should I bleed pressure after a motorway run?

No. Heat raises the gauge. Set cold only. Bleeding a hot tyre leaves it low the next morning.

What tyre pressure should a Mercedes-Benz ML 55 AMG use?

Catalogue reference is 32-35 psi front and 32-35 psi rear (2.2-2.4 / 2.2-2.4 bar), cold. Confirm on the door-pillar placard.

Handbook: placard · bar vs PSI · front vs rear · cold inflation