S-Type (X200) V8-4.2L (2005)
Crabbing is the condition in which the independent rear suspension (IRS) system is not square to the chassis. Heavily crowned roads can give the
illusion of crabbing.
Wander
Wander is the tendency of the vehicle to require frequent, random left and right steering wheel corrections to maintain a straight path down a level
road.
Shimmy
Shimmy, as observed by the driver, is rotational oscillations of the steering wheel which may come and go over time, generally resulting from wheel
and tire imbalances.
Shimmy can be experienced at any speed but generally between 50 to 90 miles/hour (80 to 145 km/h) and is most often experienced on smooth roads
at steady speeds.
Nibble
Sometimes confused with shimmy, nibble is a condition resulting from tire interaction with various road surfaces or brake disc irregularity and
observed by the driver as small rotational oscillations of the steering wheel.
Poor Returnability of the Steering
Poor returnability of the steering is used to describe the poor return of the steering wheel to center after a turn or the steering correction is completed.
Drift/Pull
Pull is a tugging sensation, felt by the hands on the steering wheel, that must be overcome to keep the vehicle going straight.
Drift describes what a vehicle with this condition does with hands off the steering wheel.
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A vehicle-related drift/pull, on a flat road, will cause a consistent deviation from the straight-ahead path and require constant steering input in the
opposite direction to counteract the effect.
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Drift/pull may be induced by conditions external to the vehicle (i.e., wind, road crown).
Vague On-Center Feel