2023 Volvo XC40 Mild Hybrid Brakes
Brake fluid specifications
Brake fluid is the medium in a hydraulic brake system that is used to transfer pressure from e.g. a brake pedal via a master brake cylinder, which in turn acts on the brake calipers.
Prescribed grade: Volvo Original or equivalent fluid compliant with a combination of Dot 4, 5.1, and ISO 4925 class 6.
It is recommended that brake fluid is changed or filled by an authorized Volvo workshop.
Brake functions
Depending on the car’s equipment, the following auto braking functions are available:
- Automatic brake when stationary (Auto hold)
- Hill start assist (Hill Start Assist)
- Auto braking after a collision
- Regenerative braking
- Warning and auto-brake when reversing
- Assistance at risk of collision
- Off road mode
- Hill descent control (Hill Descent Control)(Option/accessory)
Automatic braking when stationary
Automatic brake 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. When the car has stopped, the brakes are activated automatically. The function can use either foot brake or parking brake to hold the car stationary and it works on all gradients. When driving off, the brakes are released automatically if the driver is wearing the seatbelt and/or the driver’s door is closed.
When braking to a standstill on an uphill or downhill slope, the brake pedal should be depressed a little harder before being released to ensure the car does not roll.
The parking brake is activated automatically
- if the car is switched off
- when the driver unbuckles the seatbelt and/or opens the driver’s door.
- if the function Auto hold (brake when stationary) is activated and the car has been stationary for a while (approx. 5–10 minutes).
Auto hold can also change over to the parking brake in other situations.
Symbols in the driver display
| Symbol | Specification |
|---|---|
 |
The symbol is illuminated when the function uses the foot brake to keep the car stationary. Note that the foot brake may be active even if the symbol is not lit. |
 |
The symbol is illuminated when the function uses the parking brake to keep the car stationary. |
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.
Press the button in the tunnel console to activate or deactivate the function.
The indicator in the button illuminates when the function is activated. The activated function remains even when the car is started next time.
Applicable when switching off
If the function is active and holds the car with the foot brake (A-symbol illuminated in the driver display), the brake pedal must be depressed at the same time as the button is depressed in order to deactivate.
- The function remains deactivated until it is reactivated.
- When the function is deactivated, brake assist remains active to prevent the car from rolling backward when starting on an uphill gradient.
Auto braking after a collision
Regenerative braking (Option/accessory)
The car recovers kinetic energy during braking in order to reduce fuel consumption and emissions.
The function is available in all drive modes together with gear position D or M.
Activating brake regeneration
- Depress the brake pedal.
- The car brakes and regenerates energy.
Regeneration increases during engine braking when manual gearshift mode M is selected.
Symbols in the driver display
- If the car is a mild hybrid, a battery symbol is shown on the right-hand side of the driver display.
- When the battery is being charged, such as during regenerative braking, it is indicated by this symbol.