2009 Mercedes R-Class Owner's Manual - Page 104

Controls in detail Seats Rthe Rthe outboard second-row seats are properly locked seat backrests of the outboard second-row seats are in an upright position and are properly locked An outboard second-row seat is properly locked only when lock status indicator 1 is in hinged position and red marking 2 is barely visible. If a seat and seat backrest are not properly locked, the seat could move forward and the seat backrest could fold. You could slide under the seat belt during braking, vehicle maneuvers, or in an accident. If you slide under it, the seat belt would apply force at the abdomen or neck. That could cause serious or even fatal injuries. Seat unlocked 1 Lock status indicator 2 Red marking Seat locked 1 Lock status indicator 2 Red marking When the seat is unlocked, lock status indicator 1 is extended and red marking 2 is clearly visible. X When the seat is locked, lock status indicator 1 is in hinged position and red marking 2 is barely visible. When the seat is unlocked, push seat backrest back until the seat audibly engages. 102