Cold start squeal is very common on this model and goes away the warmer it gets. You can spray silicon but eventually it will come back. The squeal goes away when you drive. Service will likely have to mess around with the belt tensioner and tweak some other adjustments to make it vanish but who knows what they will mess up in the process.This is what I've done too. If the steering wheel whoosh gets worse I'll take it to the dealership... But I'm currently fighting with them over my cold start squeal. One thing at a time...