There have been mis-diagnoses in the past due to poor training/understanding of what they were looking at, plus I believe the actuator can be refurbed (I think Loz in past has mentioned/knows about this), rather than X thousands to buy a new one.........plus Omar at the risk of offending anyone at an MDs, how frequently do they work on them now, how much experience have said techies got? Having to resort to Maserati Spa to diagnose is a tad worrying for something which has been known about for 12 odd years!
If I were you I'd phone our resident forum indie expert Marios at Autoshield, mention the forum
P