Sorry for a rather rookie question. I am very new to vehicle maintenance, and trying to do my own oil change.
Recently I bought a used Volkswagen T5 Transporter 2.0 TDI DSG. And I've been looking at videos about oil change.
My question is: Is the DSG transmission fluid the same as engine oil?
I see many people use 5W-40 oils, and they drain it from the bottom. And I've seen tutorials to change gearbox oil for manual transmissions. But I couldn't find any information about changing transmission fluid for DSG. I know generally engine oil is not transmission oil.
Sorry if it's a really stupid question. I would appreciate greatly as well if there are links to pictures - so I can kinda figure out how it looks like from the bottom of the car.
Bonus question: What is the engine filler cap for?