it is all about your normal day to day drive, how far, how long, what engine temperatures reached etc. In the driver handbook reasonable explanation, once the warning signals come up it is generally to late to deal with and a trip to dealer needed.
This is oh so valid
The diesel engine is notorious for being temperamental if your driving style does not suit the engine.
It is a not suitable engine as a shopping and school run car, that is short distances where the engine does not get up to operating temperatures.
It needs to get into regeneration mode now and then to clear out the system, 1/2 hour with revs over 2000 should do it but its not as easy as that for it will only go into regen mode if the system tells it too.
There is also an add hoc nature to the beast as owners with said oil burning engine have reported faults despite using the car for longer journeys and at high speed, so given the same operating criteria one engine is OK whereas another runs into faults.
Different tack, the engine itself.
I owned a diesel engined Macan, its a good engine but my driving style suited it. The massive low down torque was great but for me the main problem with it was that the delivered plateaued.
At 256 bhp it is also way underpowered, and as it is based on the Audi SQ5 engine there is no reason why Porsche could not have supplied the diesel Macan with at least the same 330 bhp as the Audi engine produces in the SQ5.
Only had the diesel for six months then changed it for a Turbo which is on a different planet re performance.
The fuel consumption was also not as good as the dubious VW group publish so there is another reason not to be bothered if the diesel is not available where you are.
Actually the base 2.0 will be better choice than the diesel, its similar in power but way down on torque but it is far lighter and hence the handling of a base Macan will be better than the very front heavy diesel.