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V90 Twin Engine
Brake fluid — specifications
The medium in a hydraulic brake system is called brake fluid, and it is used to transfer pressure from e.g. a brake pedal via a master brake cylinder to one or more slave cylinders, which in turn act on a mechanical brake.
The car's brakes are used to reduce the speed or prevent the car from rolling.
Automatic braking when stationary
Automatic braking when stationary (Auto hold) means that the driver can release the brake pedal while maintaining braking effect when the car has stopped at traffic lights or a junction.
Activating and deactivating the automatic brake at a standstill
The automatic brake function at a standstill is activated using the button in the tunnel console.
Auto braking after a collision
In the event of a collision in which the activation level is reached for the pyrotechnic seatbelt tensioners or airbags, or if a collision with a large animal is detected, the car's brakes are automatically applied. This function is to prevent or reduce the effects of any subsequent collision.
Help when starting on a hill
Hill start assist, Hill Start Assist (HSA), prevents the car from rolling backwards when starting on an uphill gradient. When reversing uphill, it prevents the car from rolling forwards.