Experienced complete power failure - shut the car completely down. Took to dealer. They ran diagnostic test, put in whole computer upgrade. Told us they really did not know if they fixed the problem or not. There had been one error message that they fixed. 3 weeks later - the very same thing happened again this time rendering the car "totally gone" in the words of the dealership. They have no clue what the problem is and now our car is worth nothing. They do not even want to keep it. To say that we are unhappy is a gross understatement.
This happened even though we have kept regular maintenance with this dealership and did as they advised at 100,000 an put in a new timing belt. This is the last Volvo we ever plan to own.