No luck with my Scenic, Exhaust/Lathe

As with my little one is really the worm in it, the car just pisses me off. Just bought and already absolutely zero buck on the car. A retired vehicle / owner has passed away), workshop well maintained with many new parts. Inside optically as new, outside a few small paint scrapers. How can you have such a bad luck. The latest things, after others already more or less repaired, now comes a tubular exhaust and probably a defective light machine. Last week was the battery was empty, I thought it was broken. Luckily I still had a suitable one from my old car, which I had still removed before the scrapping. So this was built in charged and everything was fine. So I thought at least. A read out the error then a few messages which can not be deleted, but definitely wrong. Yesterday then, when my wife was on the road with the car, when the rear window heating is switched on the STOP light and the battery ances The car could still be driven home, but a check was made: 9V SPannung when the car runs, which goes up to almost 11V when the engine is stopped. Arrrrrrrrrrrrrggghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh