general problems of the 2006 Audi A6

At 150k miles, experienced no crank, no start. Tow to dealer, and I had already done some triage. They did 2 hrs of troubleshooting problems that were not even related, so I took the car back. Found a trust worthy mechanic and his diag suggested the scm burned out taking the pcm and ecm along with it. The cost would have been in the $6000 range as he stated a %40 failure rate after 150k in alldata. He also said, if I repair it, I need to replace the steering column as well because I will just have issues down the road if I dont. The car also had a slow oil leak. The place where I bought the car said the repair is not worth the cost, so that factored into my decision not to invest in repairs. The oil leak was slow and I never had to top off the oil, but it was significant enough to know it was an issue. That leak was present after 80k miles. So I had to make the unfortunate decision not to invest any money into an attempted fix. I was at the gas station, had just filled up the gas tank, had new struts, new battery and prior to it not starting, the car was running so really good. It looked great and people often thought it was way newer than it was. There was way to much value in the car to trash it, but various parties only offered $200 to scrap it. This is a high end car for Audi and I cant believe they are allowed to implement a kill switch after 150k miles. I was planning on keeping that car for a long time. Now unemployed, I have to buy a car I cant afford.