What's the best way to warm up my Audi when driving in cold weather? How long should the vehicle be in idle before I start to drive?
Newer, modern vehicles don't require idling for the vehicle to warm up. Most can be driven in cold temperatures without excessive idling, which is actually bad for the fuel mileage since the vehicle is receiving zero miles per gallon. This is instead a requirement for old vehicles that still use carburetors. With today's fuel injection technology, modern car computer systems, and the use of thinner synthetic oil, warming up the vehicle fully is no longer necessary before taking off. To warm up the engine, it would be best if you go easy at the start. Driving more gently would be better than idling. This will put less stress on the engine. It's okay to idle after starting the engine if you're heating up the interior or defrosting the windshield, which is common during winter.
What's wrong with using glass cleaners that contain ammonia? Cleaners with ammonia work out fine in cutting grease. How could these be a bad choice when cleaning the windows of my Audi Q5?
Glass cleaners that contain ammonia are good grease cutters. Some car owners use ammonia-based household glass cleaners for cleaning the glass of their vehicle. This, however, is not recommended because ammonia can dry out leather, vinyl, plastic, and rubber. It's also not safe because this active ingredient in the cleaner may release fumes that may be inhaled, especially when used in the car interior. Ammonia-based cleaners are not good for tinted windows. If you have this kind of windows, then you should look for ammonia-free glass cleaning solutions or pick those that are labeled as "tint-safe."
What's wrong with using acid-based wheel cleaners? Some auto detailers and shops use them.
Acid-based wheel cleaners can easily clean off brake dust and remove caked-on dirt and stains. That's why some shops prefer to use them—they don't require much effort or elbow grease when cleaning the wheels. But while they're fast-acting, these cleaners can be too strong that they may damage the finish of the wheels, especially those specialist types. Non-acidic or acid-free wheel cleaners work well but they don't work as fast as the acid-based solutions, especially when used on heavy dirt and stains. Still, they're gentler and safer on the finish.
There's this smell of gasoline on my Audi. Is this normal? Or should this be a cause for alarm?
The smell of gasoline indicates a gas leak. The leak could be coming from the fuel injector line, gas tank, or other parts of the fuel system. You have to trace the source and check the lines and components to fix the leak. There could be a leaky hose or a cracked fuel system part somewhere. It would be best not drive the vehicle until the source of the leak is found and the fuel system has been checked. This can be a potential fire hazard; hence, it requires your immediate attention.