It's the 3C. The timing belt was done at 100k, but I'll have to double check when the DSG was looked at.
Had a decent look under and in the engine bay and couldn't spot any leaks - but its the equivalent of asking a plumber to check your computer for any issues
After reading your comments I'm convinced that the inspection from the VW specialists is well worth the money - if they don't VCDS scan it then they probably aren't someone I should be taking this car to. I'll make sure to add these other things to the list - especially having googled what DPF is, haha.

Thanks for the input so far!