Mercedes-Benz drivers expect the best performance from their GLS SUV lineup. To feel the luxury that the vehicle brings, you must schedule occasional maintenance intervals to ensure no faults are unattended. All the parts of Mercedes-Benz GLS are carefully machined; therefore, don't settle for less when it comes to maintenance. To find out how often you need to take your Benz for maintenance, check on the driver's manual before any inspection is done.