While slowing down and just about to make a turn into a private residence off of a highway, multiple indicator lights illuminated and audio warning "dinging" occurred for approximately 3 seconds. As I had already been slowly applying the brakes and starting to slightly turn the wheel towards the driveway when those warnings briefly came up, the moment the lights and sounds stopped, vehicle then maintained speed (while still on the brakes) and locked steering position it was at simultaneously. Having no control at that point, it continued until crashing into a wooden fence. Once at a complete stop, cabin lights and "dinging" activated as it acknowledged the impact. And although it was only going about 15 mph, seemingly to only have damage to the front passenger side bumper/headlight area, it would not shift into any gear or turn off. Not to mention that the front passenger side airbag(s), or any of them, deploy- seriously raised even more concerns as the main reason I purchased a Volvo was for their well known status of safety standards. Had this obvious electrical malfunction happened moments before at higher speed/steering straight ahead, it would've resulted in very serious injuries to myself and others while it speed through 2 intersections at a highway ramp just down the hill. Was towed to a local collision repair & auto body shop until Progressive Insurance took it to their damage assessor where it was declared a total loss. I've owned it for almost 3 years and always ha