I know i'm late with a reply, but yes you can now purchase an obd2 diagnostics tool that will help you with the deletion of trouble codes , they may well appear again of course if the defect has not been dealt with .
go to my site and you can get the same type as I use and get 10% off the list price .
Good luck with the car.
http://www.aclassinfo.co.uk/index.html
