Case: right back seat back abnormal

     There is a Mercedes-Benz W220S320 sedan, usually the car's "body" very good, but recently found that when all the doors are closed, the car started, the right back of the back there will be "click" Open any one door, the sound and disappeared. The following are the same as the "

     Check: SAM after the water trace

     First with the star diagnostic test, found no fault; then, ears to listen to, found in the car outside the sound are audible, the car took a while to ring. So, put the right rear windshield outside the trim removed, looking for the source of the sound, found in the seat belt assembly sound. When the seat belt is inserted, the sound disappears. When the star diagnostic test again, found that the balloon is faulty. S68 / 4 signal is changed with the sound, through the check circuit diagram found S68 / 4 fire is provided after the SAM, then remove the SAM check and found a water track, and oxidation, some of which have been plug damage. Asked the owner, that the car into the water, so even if the clean up the thread, the original installed after the SAM, the fault is cleared.

     Diagnosis: Replace the new SAM

     Put on a new SAM computer, once again observed, the disease immediately disappeared.