No never.I had one level sensor broken front left and since it was replaced at a local garage I have only 2 levels.Comfort and raised.The local garage's software shows no fault and the same at the main Mercedes dealership in Glasgow.I feel some slight difference at sport 2 but nowhere close to what I used to have.Stationery the car does not drop at all form Comfort to Sport 1 or 2.Then perhaps it's not related to the suspension but another issue.
You take the car abroad often?