1998 Audi A6

I have a 98 Audi A6 Quattro sedan four-door gets great gas mileage I put a lot of money and time into this car and it still needs more work but it does run and drive it was my daily for 2 years. It has 211 k miles on it, gets 30 miles to the gallon it is all wheel drive. The only cons about it is it still smells like oil when I use the heater I replaced all seals for oil valve cover gaskets oil pan gasket Etc, and the brakes were great they're all brand new brake pads and rotors, the ABS system needs bled I didn't have the time nor the money to do that so I disconnected the ABS all together by removing the fuse to the ABS. When I bought it it had to check engine light on I ran into OBD reader on it and I thought I fixed everything but it still has the check engine light on. It's a great car though I just don't like working on German vehicles. I'm asking $1,800 for it or best offer