Of course it still locks, what you removed (so I have been told) is a redundant latch that keeps the plunger extended unless you turn the key.

With the parts gone, there is no "LOCKING" of the plunger, but that does not matter, since there is no way to get in there and push the plunger back anyway. And THAT is apparently why MB left those two parts out in 07 and 08 models.