Mercedes-Benz · GLS 400 · Rear

Mercedes-Benz GLS 400 rear tyre pressure

Drivetrain: all-wheel drive
Body: SUV / crossover
PSI F / R: 32-35 / 32-35
Bar F / R: 2.2-2.4 / 2.2-2.4

psi rear

2.31 bar · 231 kPa at the rear axle

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

The rear of a SUV / crossover takes passengers, luggage and, on vans, payload. Catalogue rear pressure on the Mercedes-Benz GLS 400 is 32-35 psi / 2.2-2.4 bar. TPMS typically warns near 25 psi (about 25% below target). That is already a soft tyre, not a fill target. Keep side-to-side spread inside about 2 psi so the all-wheel drive hardware is not working on a radius mismatch.

Mercedes-Benz GLS 400 placard versus sidewall

Sidewall PSI is a carcass maximum. Recommended operating pressure for this GLS 400 is the pillar sticker, near 34/34 psi.

Estimated pressure by tyre size (215/70R16 and others)

215/70R16 is the first planning size here. 245/60R18 is usually the plus-size or LT step. Keep load index at or above original equipment.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
215/70R16	—	34	—	2.34	—	234	Compact crossover
225/65R17	—	35	—	2.41	—	241	Very common 17-inch
245/60R18	—	37	—	2.55	—	255	Heavier CUV
235/65R17	—	36	—	2.48	—	248	Mid-size SUV
245/55R19	—	36	—	2.48	—	248	Low-profile 19-inch
255/50R20	—	37	—	2.55	—	255	20-inch plus-size
225/60R18	—	35	—	2.41	—	241	Highway CUV
235/60R18	—	36	—	2.48	—	248	Plus-size 18-inch

Pressure against load

Load moves the rear of a SUV / crossover 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	38 psi / 2.62 bar

A family SUV / crossover with a boot full of luggage should use the laden rear figure if Ford, VW or Mercedes printed one. Otherwise the modest steps in the load table are only a sketch for this GLS 400.

How to set the GLS 400

Park the Mercedes-Benz GLS 400 for at least three hours (cold tyres).
Use a calibrated gauge, not the only meter on a forecourt hose.
Set the placard for that axle — about 32-35 psi / 2.2-2.4 bar front and 32-35 psi / 2.2-2.4 bar rear on this catalogue row.
Recheck all four. A 2 psi miss on a all-wheel drive GLS 400 is enough to feel a pull.
Refit valve caps and reset TPMS if the handbook asks for a relearn.

PSI, bar and kPa

PSI-led conversions for the Mercedes-Benz GLS 400 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 GLS 400.

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 GLS 400 is actually occupied that day.

Spare and inflator kit

A matching full-size spare on the Mercedes-Benz GLS 400 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.

A cheap gauge and a monthly habit will do more for this GLS 400 than nitrogen upsells.

Other Mercedes-Benz models

180 416 190 260 170 240 300 250

Questions about this GLS 400

Is the sidewall number correct on a Mercedes-Benz GLS 400?

No. Sidewall PSI is a maximum. The GLS 400 placard is the operating target, near 32-35/32-35 psi.

What tyre pressure should a Mercedes-Benz GLS 400 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.

Front versus rear on the Mercedes-Benz GLS 400?

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.

How often should I check a GLS 400?

Monthly, before a long trip, and after a 10 °C weather swing. Include a full-size spare.

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