2010 Mercedes-Benz E-Class - What tire pressure

The early Corvairs (of “Unsafe at Any Speed” infamy) required very different pressures front and rear. Too many owners and garage guys didn’t follow this regime, and that was a factor in many Corvair accidents.

The picture in that Mercedes instruction could be made to more clearly indicate that the range of front pressures is different from the range of rear pressures. Any graphic design sophomore should be able to improve it.

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So true about the Corvair, in the 60s, every tire we mounted, went on a car at 30 PSI, no matter what car, not a good practice!

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Yes, American neglect of the part of the vehicle touching the road could have accounted for most of the Corvair incidents.

As for the Mercedes graphic? Think ICONIC - in symbols. Notice the picture of the car. The cold pressures under the front of that car are for the front tires, the pressures under the back, for the rears!

One set of pressures is for most of the sedate driving public, two to three people daytripping. The other, for constant full capacity plus freight or luggage, or, for sustained driving over certain speeds, IE: 160kph/100mph.

Sometimes car makers list the ‘sedate’ pressures only on the door pillar, to keep it simple, and the high performance pressures in a different location, such as inside the fuel filler lid.