I have seen the AC sensor in the middle of the dash on the 126. Not sure which year it was.
I'll have to agree with Adam on the warping. My friend ordered one for his 126 from Coverlay. It looked pretty good, but it totally deformed in about 6 months (they have lifetime warranty).
We sent it back (had to argue with them because they usually send a replacement) and ordered a complete used dash from Potomac (www.pgauto.com)
I replaced it for him and it looks great now. He's taking real good care of it now with Mercedes leather care lotion and a sunshade.

If yours is cracked I suggest looking around for a good used one.

Good luck,
Vin