This is the first time I forgot the light inside the car and let it sit for 4 days before realizing that the Q7 was totally drained the battery. All the warning lights were on, the door locks didn’t work, I had to use the key to open the door and the hood. It’s been …
Audi electrical system is very sophisticated especially with A8 D3. This is how I understand the system. The electrical system in general includes Alternator, Battery, Power Management System, ECM (Engine Control Module).
It’s been cold and the Q7 hasn’t been driven for a while, the battery drops to 11.4V, I need to charge it. I’ve bought a really good charger from Schumacher SC1280 with 15A capacity. The Q7 battery is under the driver seat, therefore, there are two poles (terminals) marked red for positive and “-” on …
