Hello, as the post states I am looking to purchase an Audi A6 C7 3.0bitdi 2012. The reason for this post is that I would like to know how can I check If it really is a 3.0bitdi or a regular 3.0tdi, since visually I can't tell the difference and I like to be sure in what I purchase. Sorry if the topic is a bit strange but I couldn't find anything regarding this. Thanks in advance!