Correct answer
Automatically regulate height to the specified level within system limits.
It automatically regulates body or chassis height relative to the axles to maintain the specified level by adjusting air in the suspension elements. This operates within system conditions and limits; it does not guarantee constant height under every overload or fault or permit exceeding axle limits or MAM. Some configurations provide particular levels for loading, unloading or driving according to manufacturer instructions. Observe the specified driving height and maintenance requirements.
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Permit any overload without axle-mass limits.
Automatically regulate height to the specified level within system limits.
Always guarantee the same height even if the air supply fails.
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