2017 Subaru Impreza Pricing and Specs

The smell you're describing has been around since 1986 when all new cars sold in Australia were forced to use unleaded petrol. That move was to protect the catalytic converters fitted from that date (leaded fuel would have damaged them) and the combination of these converters and the new fuel resulted in the smell you're noticing. So it's not new, but it does vary from car to car and possibly even from one brand of fuel to another.

It's supposed to be harmless to humans, but if you can smell it, that automatically means you're being exposed to other chemicals in the car's exhaust emissions, including various carcinogens and carbon-monoxide which is a known killer. Think of the rotten-egg smell as an early-warning system that there's exhaust gas in the air around you. Excessive gas can also be a symptom of a car's engine that is not turned correctly.

It's really important not to run a car engine inside a garage for any longer than is absolutely necessary as these toxins can build up very quickly. It sounds like your garage is attached to your house, and that reminds me why garages were once separate to the house they served. (As were kitchens in the very old days, as a means of ensuring a kitchen-fire didn't take the rest of the house with it.) Don't be tempted to reverse into the garage, instead drive in nose-first, leaving the tailpipe nearest the garage opening and never start the car with the garage door closed.

One to try is the Ford Focus; it has a rear view camera, GPS, Android Auto and Apple CarPlay, and fits within your budget.

If you've got dash cam footage that conclusively shows the breakage wasn't caused by some external impact I would say, yes, pursue it. But if there weren't conclusive proof that it wasn't caused by an object impacting the glass I wouldn't go any further.