Mercedes-Benz 500 SEC Operator's Manual download pdf (Page 85)

85

Acceleration Slip Control (ASR)

The acceleration slip control will

engage at all vehicle speeds, if one or

both drive wheels begin to lose traction

and spin. While engaged, the yellow

function indicator in the speedometer

lights up.

With the acceleration slip control

engaged, the brake is applied to the

spinning drive wheel until it regains

sufficient traction. If both drive wheels

lose traction and spin, the brake is

applied to both drive wheels and

simultaneously, engine torque is

limited.

As traction on the road surface

increases, the allowable engine torque

also increases again and the brake is no

longer applied to drive wheels.

Caution!

If the vehicle is towed with the front

axle raised (see Towing the vehicle in

Index), the key must not be in steering

lock position 2. Otherwise, the

acceleration slip control will

immediately be engaged will apply the

rear wheel brakes.

Notes:

With the key in steering lock position

2, the yellow function indicator lamp

and the yellow ASR warning lamp in

the instrument cluster come on. They

must go out with the engine running.

If the ASR warning lamp comes on

with the engine running, a malfunction

has been detected. Pressing the

accelerator pedal will require greater

effort. Only partial engine output is

available.

Have the acceleration slip control

checked at your authorized Mercedes-

Benz dealer as soon as possible.

Driving the vehicle with varied size

tires will cause the wheels to rotate at

different speeds, therefore the

acceleration slip control will activate

(yellow ASR function indicator lamp in

instrument cluster comes on). For this

reason, all wheels, including the spare

wheel, must have the same tire size.

When testing the parking brake on a

brake test dynamometer, the key must

not be in steering lock position 2.

Otherwise, the acceleration slip control

will immediately be engaged and will

apply the rear wheel brakes.

In winter operation, the maximum

effectiveness of the acceleration slip

control can only be achieved with M +

S radial-ply tires recommended by

Mercedes-Benz.

The brake pad wear warning lamp

indicates brake pad wear for the front

as well as the rear brakes.

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