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Just purchased a 2014 E53S and need to replace some interior parts and looks to see if anyone had info on replacement parts. See pics below and info would be greatly appreciated!!
Welcome to the forum. Mercedes does not sell replacement buttons. Your best bet is to find a used head unit (even faulty as a donor):
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Control Unit, Operating Unit, Heater and Air Conditioner, p/n A2129006727 (replaced A2129000328, A2129003014, A2129003900, A2129004300, A2129004725, A2129004807, A2129005218, A2129006102, A2129007604, A2129008808, A2129008911, A2129009309), $390 new
Control Unit, Head Unit NTG5/NTG5.5, p/n A2129007527 (replaced A2129002222, A2129003723, A2129005625, A2129006723, A2129006726, A2129007426, A2129007525, A2129009224), $2750 new
For the temp control, all you need is a chrome strip it seems. Perhaps, you can find a suitable piece elsewhere and glue to size if this is your thing. Otherwise an entire panel replacement.
I do not have experience with NTG5, but rebuilt NTG2.5 several years ago. The front panel is easily replaceable once the unit is removed. Like I said, a donor unit even inoperable can likely be used to swap the worn-out front control plate. Recommend searching other forums for NTG5 button replacement advice. I bet there are discussions about worn-out buttons. Good luck.