[Mazzie1983]

I'm not the foremost expert on this model nor the foremost expert on Maserati. What I can tell you from being in two different generations of Maserati cars including my 2015 GTS is that the QP6 doesn't do anything the S Class or 7 series does.

The S Class is designed to be muted from the road including bumps and noise. The 7 series to me feels like a large BMW, no more no less. Sportier than the S class but still muted compared to the Maserati.

The Maserati will feel harsher and noiser than either one but it will be closer to a sports car than any other giant 4 door car. Noisier is good if you think the exhaust note is amazing, and harsher is good if you want road feel during spirited driving. The Maserati also has a ton of backseat room and tons of leather. I would rather be in the back of the Maserati than the 7 series and maybe the S Class depending on the configuration.

That being said the QP6 still feels very Fiat/Chrysler compared to the QP5. Despite all the leather there's lots of cheap plastic and rattling noises that will appear from all the plastic. Parts can be difficult to find at times and as you can see here there is very little DIY support compared to the QP5. As far as corrosion I haven't heard of that happening at all on the QP6. I would however expect the usual randomness that Maserati has which could include thermostats going out, water/fuel pumps failing, etc.