Should I buy this 2014 Audi s4

The car is a white automatic s4 and it’s got 123,100 km it’s selling for 13,995 cad the carfax doesn’t really have anything about maintenance seemed like it was only ever brought in for registration and a few services here and there. I’m assuming he might have done stuff himself but not sure. It does have a check engine light and is being sold as is and I can’t tell how much rust it had due it it being painted over. I want some opinions on if you guys think it’s smart for me to buy it or not any help would be greatly appreciated.