I'm aware of the heater matrix, and tbh this one terrifies me I've already commented on the heater matrix thread! I do a lot of my own maintenance too, and depending on the car and how much it's service history may be worth, I also do my own servicing and my next 'weekend' car will be the same. I'm confident with basic engine work too I did a full coolant system/belts refresh including water pump, thermo etc on my M3 myself which I would happily do again, but this heater matrix and seeing the car in the DIY thread at it's half way point I find quite scary. I'm not the best with trim items..
The other things mentioned don't worry me as I can do the labour myself. The more I research the more I feel the 4200 is less maintenance than my E46 M3 is potentially capable of. Mine is the SMG which is a very similar set up to Cambiocorsa and I'm familiar with the setup. But the pump on the M3 is over 2k from the dealer. If we do it the cheap way, a replacement motor for the pump is still £500. Considerably more than the Alfa Selespeed pump! I guess I just find it surprising that a Maserati may be within reach for me, especially as I recently realized what they are priced at.
I guess coming back to those adverts I posted.. I'm more and more tempted to list my M3 up for sale early..
I can't help thinking those adverts look pretty decent, so I'm wondering what you more experienced Massers would think. I think I would go for the PPI route this time though.