One problem related to sun/moon roof assembly has been reported for the 2015 Mercedes Benz S550. The most recently reported issues are listed below.
The contact owns a 2015 mercedes-benz S550. The contact stated that the vehicle was taken to the dealer to be serviced under NHTSA campaign number: 21v197000 (structure) and the dealer declined to service the recall because the sunroof panel was glass and not plastic. The manufacturer was made aware of the dealer's refusal and contacted the dealer. The manufacturer stated that the dealer would repair the recall. The contact stated she called the dealer again however, the dealer declined to remove the bonding adhesive and replace the front panel per the recall. The failure mileage was not available.