The battery is dead, you are going nowhere so why take the handbrake off. But, if you insist, just connect a good battery to the dead battery and jump start the engine.
Flat battery
Flat battery
To release the automatic handbrake on a Renault Laguna when the battery is flat, you can manually override the system. Locate the manual release lever, which is typically found near the handbrake mechanism under the center console. Pull the lever or press the button as per your vehicle's manual instructions to disengage the handbrake. If you're unsure, consult the owner's manual for specific details related to your model.
To reset the ECU of a Vauxhall Insignia, first, disconnect the negative terminal of the battery and wait for about 10-15 minutes to allow any residual power to dissipate. Reconnect the battery terminal, ensuring a secure connection. You may also want to use an OBD-II scanner to clear any fault codes, which can further help in resetting the ECU. Finally, start the vehicle and let it idle for a few minutes to allow the ECU to recalibrate.
Probably your charging system is failing, or your battery is bad.
The battery is a CR2032, Vauxhall part number 90541381.
just charge the battery. should do the trick....
the battery is underneath the carpet on the passenger side of the vivaro.....
none....you must charge it
you get 3 mins to change the battery.
from the back of the alternator to the dash to the battery
Disconnect the battery for 10 minutes.