Volvo v60 D2 auto stop start issues
 

Hi
I've just purchased a v60 D2 auto
Drove home yesterday was fine on the motorway till I hit heavy traffic stop start was on and then it just stopped and wouldn't start again I thought it was a battery issue
Got it jumped started took stop start off and drove home 15 miles no problem
Got up this morning wouldn't start again
Bought a new AGM yuasa battery
Fitted it started first time
Used all day no worries
Went to fetch my wife bang same thing happened lads at the local car dealership helped me put spanner on it and there jump pack tried loads of times still wouldn't start
Put in park was rolling back sometimes
I jumped in put in neutral tried and started drove home
Parked on drive just switched it off
Tried to start it started 1st time again
Anyone out there got any ideas what could be happening with it
Regards Richard