2004 Mercedes-Benz S500 4MATIC Q&A

2004 Mercedes-Benz S500 4MATIC Question: The a/c is going off at times that I'm not turning it off

I brought it to delray automall to fix and they said that they replaced the resistor blower motor. The same problem is still happening and now won't come on at all. Could you please advise me on how to tell if they even changed the part and the location of it. I think that it's under the pass. front dash but I want to make sure before I start to take the thing apart. Thank you, Melissa 772-626-5257 -
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