Both rear door locks 2001 E320 4matic
Hello: All 4 of my door locks unlock when using the key, but only the front doors lock on the first try. The rear doors do lock if I hit the key 2 or 3 times in quick succession. I can manually lock the two rear doors by pushing down the door buttons. Also, as I start to drive, the two front doors automatically lock, but the two rear doors do not (and they remain unlocked for as long as I drive). Thank you so much in advance to anyone who thinks they can identify the problem/solution.