2007 Mercedes S-Class Owner's Manual - Page 411

Controls in detail Driving systems Range of the sensors The sensors of the Park Assist system are integrated in the front and rear bumpers. Make sure that the bumpers are clear of dirt, ice and slush in the area of the sensors, as otherwise, Park Assist may not function properly, see "Cleaning the Park Assist* system sensors" ( page 538). Front sensors Center Corners Rear sensors Center Corners approx. 50 in (125 cm) approx. 24 in (60 cm) approx. 40 in (100 cm) approx. 24 in (60 cm) i Due to the sensors' broad detection range, it is possible that Park Assist also detects the following obstacles and issues a warning: obstacles in the ground, e.g. sewer canal covers, rails, bumps in the road or gutters obstacles moving upward quickly, e.g. rolling garage doors ! While parking, pay particular attention to objects over or underneath the sensors, e.g. flower boxes, an elevated crossbar or a trailer tow hitch. Park Assist does not detect such nearby objects. You could otherwise damage the vehicle or the objects. 410