Mercedes-Benz ML 320 Operator's Manual page 170

Instruments
Operation
and controls
Driving systems
Driving the vehicle with varied size tires will cause the
wheels to rotate at different speeds, therefore the ESP
may activate (yellow ESP warning lamp v in
speedometer dial comes on). For this reason, all wheels,
including the spare wheel, must have the same tire
outside diameter.
When testing the parking brake on a brake test
dynamometer, the engine must be shut off. Otherwise,
the ESP will immediately be engaged and will apply the
rear wheel brakes.
In winter operation, the maximum effectiveness of the
ESP is only achieved with Mercedes-Benz recommended
M+S rated radial-ply tires and/ or snow chains.
Synchronizing ESP
If the power supply was interrupted (battery
disconnected or empty), the BAS/ ESP malfunction
indicator lamp may be illuminated with the engine
running.
After driving off the BAS /ESP malfunction indicator
lamp should go out after approximately 110 - 220 yd
(100 - 200 m).
Instrument
Driving
cluster display
167
Practical hints Car care
ESP control switch
ESP control switch located in center console.
To improve the vehicle's traction when driving with
snow chains, or starting off in deep snow, sand or gravel,
or off-road driving, switch off ESP by pressing the upper
half of the ESP switch. The ESP warning lamp v,
located in the speedometer dial, is continuously
illuminated.
Technical
Index
data
P54.25-2037-26