Having recently acquired an A6 2.7TDI I would like to make an intelligent decision about which engine oil to use, but the handbook says it depends (among other things) on whether I have a diesel particulate filter. It also says that I can find this out by looking at the maintenance plan, or whatever it's called in English (in French its title is plan d'entretien), i.e. the document in which workshop servicing is recorded.

I've looked through that document but I can't find the answer. I've also checked the option codes on a website that exists for that purpose, and none of them refers to the DPF, unless by any chance it is '7GN', which produced the message "code not found".

I know I could get an answer by calling the workshop, but it seems to me that it should be recorded in the car's documentation somewhere.

Does anyone know?