Excellent thread and thought I would add my experience of the ERAD failure and the favourable outcome.
Last week Saturday, driving along country lanes with approx 10 miles available on charge, car was switching between engines depending on gradient and suddenly could hear firecrackers going off under the car and strong burning smell followed by juddering and grinding sound from the back wheels. Volvo assist came out and recovered car after 4.5 hours (another story, should of just called my AA).
Dealership rang on Monday to say tech has driven it, cant see no issue (While waiting I did go backwards and forwards after the car had a chance to cool down and problem seemed to have gone). Gave more details to the service manager and said would try again. Next day rang to say problem had reoccurred on test run and its the ERAD.
Volvo UK will foot the bill fully but they cannot supply car replacement. If it went through my Volvo warranty, then they would pay for hire car but as its Volvo UK, no hire car. Dealership were excellent and have always found them very helpful and supplied us with one of their older cars which kept us mobile. Friday car was ready and having driven it since feels more responsive.
Just to add my car is 5 yrs old exactly today (from registration) and its a MY17. I have carried on the Volvo warranty after the 3 yrs warranty expired (Volvo card in post) and service it at that dealership. Also its only done 35k so I am not sure if these factors are taken into account when Volvo UK decide on who pays the bill and how good a case the dealership puts to them.