Other changes included reworked interior door panels. The 2015 model year updated interior door panels. The two adjoining rooms are connected by an interior door. These coloured leathers may also be applied to interior door coverings and rear parcel shelves. The revised interior door handles have been moved slightly forwards and upwards. Engine oil changes and minor maintenance work is done through an interior door. The Limited model and Orvis Edition model both got chrome interior door handles. When introduced, the Class 150s had unique interior door open/close buttons. Interior door handles and clock surrounds were finished in red to match the exterior paintwork. The interior door panels and seats were freshened, with side-impact airbags becoming an option.