In the two years I have owned it:
Dashboard replaced twice, but in dealer 5 times for fault identification
Rear tail gate rehung
Suspension adjusted
Brakes replaced twice
Wipers failed
Kick plate replaced
Door rehung
Not full specification when delivered.
The car is practical for London, but rattles like a 5 year old Skoda. The dealer service is not great, but that might be a factor of the frequency of visits.
Mercedes Head Office seem unwilling to accept repsonsiblity for the service and our satisfaction levels although the admit the technical problems are unusual.
The good part is, I assure you this car will be good for many thousands of miles. Just service it at due times.