I just bought one with 311 000km so it's safe to say that the engine will last a very long time. However, like any VW, there will be more little things to fix from time to time, some a bit more expensive... At least compared to a Honda or Toyota.
However the drive feel is far more solid and the car is generally more comfortable. At least to me.
I went from an MK4 Jetta to MK5 Jetta. I got myself a 2016 Honda Civic 2.0 for the sporty Honda feel and most importantly the durability and almost lack of maintenance on those cars... and I am selling it because my lower back doesn't agree with it. I love it but I can't drive it long trips.
So now I am on the newer Golf Sportwagen (I think USA has Jetta Sportwagen but Canada writes Golf on the back)
(Here is my new baby)
https://photos.app.goo.gl/M2TB658MPYe3oQRRA
Things to expect. Timing belt of course needs to be done every 120 000km
Given the low mileage of your car for the year, you may have some things to fix, but once done it should be excellent.
And from what I read or seen from many popular youtube mechanics, the most expensive part of the new 2.0 TDI's is the emissions stuff. When it goes bad it's expensive to fix. Many people delete it and go for a tune. It's not legal but depending on where you live it may not be an issue.
If you live where it snows, (I am from Montreal). Your rocker panels are going to disintegrate. It's better to catch the rocker panel rust early and either fix it yourself to delay the inevitable or get it professionally fixed then to let them go.
https://photos.app.goo.gl/L6tv9cmejaz7XvBw8
I eventually did a super mediocre job pasting over an aftermarket rocker panel
photos.app.goo.gl
This affects all MK5/6 VW living with 5-6 months of snowly and salted roads.
MK4's somehow don't rust as much.
Also, if someone puts gas in it... the entire fuel system goes.
Older 1.9TDI's could survive, newer 1.9TDI's would have injectors fail... the new one gets totally screwed.
But if you take care of it and do lots of driving, the car will take great care of you.
Also take everything I said lightly as I am not a mechanic nor the most knowledgeable guy on here for those cars... Just my experience up to date.