This post is really interesting. I also have the 1072923 battery pack. Originally the car was delivered as a 70D back in July 2016 fully charged with 240Mile range reading on the instrument gauge. I asked my SC to upgrade the car to 75D. After fully charging the car again, it had no change in range what so ever. It still read 240miles...I was expecting 259 or some kind of increase. The SC has fobbed me off for 3 years with various excuses and now are saying they don't keep records that long and after testing the car, saying it is within an acceptable range. To top it off the uncorking was also a no
I really do believe there something definately wrong with this 1072923 battery pack sadly.
Did you ever get anywhere with your service centre with regards to below average range or uncorking?
Did you pay for the range increase? I would get your money back if you did. That's an easy argument.