I am reading up about the TD1 flag and how it tells Audi there has been an un-authorized/unexpected change to the engine control module. But I can't find any info on whether or not VCDS can be used to detect TD1? I am due to take my car into Audi for some work and want to check before I go in, just in case. So can VCDS detect a TD1 flag? And if so, how do I check? Thanks!