Hi again,
That's correct. The housings are completely different. But the Pushbutton switch assy and the ac switch and the temp dial all will switch between the two. The 116 housing has four legs on it that attach to the panel, the 107 housing has three tabs.

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Richard Wooldridge
'01 ML320
'82 300D 4.3L V6/T700R4 conversion
'82 380SL, '86 560SL engine/trans. installed
'79 450SL, digital servo update
'75 280C