Anti Slip Differential
The automatic locking differential improves handling when moving off on a road surface which is slippery on just one side. The locking differential is immediately disengaged when the brakes are applied, so that the ABS function is unaffected.

A major advantage of ASD is that it switches on and off automatically at the appropriate moments, thus relieving strain on the driver. A warning light in the instrument cluster alerts the driver whenever ASD is in operation.

Driving Dynamics systems: ASD, ASR and 4-Matic

All 2.3-16 valve 190 models are fitted with a Limited Slip Differential (LSD) as standard. They were also available with Mercedes’ ASD system which was standard equipment on the 2.5-16v. The ASD is an electronically controlled, hydraulically locking differential which activates automatically when required.

The electronic control allows varied amounts of differential lock from the standard 15% right up to 100%. It is not a traction control system however, and can only maximize traction rather than prevent wheel spin. Activation of the ASD system is indicated by an illuminating amber triangle in the speedometer.

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