Ran into this same problem last weekend while trying to fix the stinking AC problem.
That connector just broke with very little pressure and it would not come out of the housing no matter how i tried.
Was a pain to get the broken half out of the speaker housing.
For now, i used two separate header pin kind of connectors and spliced the other end of these with the wires in the car. (see attachment for example of what i am talking about!)
Its hard / almost impossible to find those exact original connectors. After searching the whole internet., could only find 1 site which was willing to take my order (for the Mercedes part number posted on this thread!).
Interestingly that part is called a 'clutch'. (
https: slash slash www dot ecstuning dot com/b-genuine-mercedes-benz-parts/clutch/0255452726/) - Will take a while to ship - but will report once i get them (if i get them!)
In the mean time, to test my current in-line splice solution with the header pins, I put the car on autopilot and rebooted it (while driving) and did not touch the steering..., and let the car beep (while the display was rebooting). I cloud hear the beeps come via this speaker (its not the normal frequency/tone beeps that you otherwise hear, its a bit different.).
--- btw, this test was done in a street with no traffic - in a safe condition.
Also, the 'white' wire from the car harness goes to the left pin when the speaker is mounted on the car. (i.e, driver side in the US/left hand driving models).