Hello dear people, have a Volvo S80 I T6 with 104 tkm. If the car is standing for 2 days the battery is always dead and the car does not start. After 1 day DER starts tedious. My problem is that since yesterday the complete electronic spins. It started with the message, slides. Maintenance required and shortly afterwards followed brake failure safely stop and engine maintenance. additionally the BC and the speedometer has failed and power loss. The car has been driven as if it has only 72 instead of 272 ps and the transmission has also turned funny. At the next start also transmission maintenance was necessary. All possible lights burn like engine control lights, ABS, engine oil lamp etc. Would a new battery solve the problem perhaps ?? Would you be grateful if answers come Mfg