Audi 243 Service Manual page 2

The 4-level air suspension system in the Audi allroad quattro
The 4-level air suspension system in the allroad quattro is a logical development of the self-
levelling system in the Audi A6.
The principles of the suspension/air suspension system and the description of those system
components which are identical in the 4-level air suspension system are described in SSP 242.
The contents of this self-study program are supplementary to the contents of SSP 242.
Introduction
Designing a vehicle this perfect for on and
off-road use sounds like squaring the circle.
Usually the strengths of an off-road vehicle
are decided weaknesses when it comes to
road use.
A high ground clearance, crucial for rough
terrain, gives the vehicle a correspondingly
high centre of gravity.
A variable ground clearance is the solution for
all road use and it's called
4-level air suspension .
The air suspension realised in the allroad
quattro is based on the familiar self-levelling
system of the Audi A6.
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When it comes to fast cornering, however,
this is as disadvantageous as it is for driving
stability at higher speeds. In addition, the air
resistance is increased, which significantly
affects fuel consumption.
In contrast, the shorter spring travel and the
firmer running gear matching of an "on-road
running gear" offer inadequate driving
comfort off-road.
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