XC70 – A few questions

Moin forum friends, maybe it’s because it’s about to be consecrated but in the last few days I thought about replacing the Dickelch of my better half with an XC70. Not that we wouldn’t be happy with the 90’s but technically it’s not quite at the height anymore. In addition, our old four-legged friend has so much to jump into his box, the Ldekante is relatively high. So XC70. The first question concerns the GT in conjunction with the D 5 Engine: I read somewhere that the starting weakness is still a topic. Our XC90 is equipped with GT and needs a few moments, until it finally starts. So, from your point of view, the combination GT with D5 engine has improved compared to earlier (we drive a 05 XC90)? Does all assistance systems work with the circuit? Furthermore, a question about the Polestar power increase to 230 hp. Does anyone of you have it installed in the XC70? as with the 215 hp variant? Can you confirm that there is no additional consumption? Last but not least the auxiliary heating: Is it right that in the XC70 of 2013 electric heaters are built over and that one therefore has to order the auxiliary heating and the function can no longer be unlocked? Thanks already for the answers and beautiful Christmas days Texan