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In my opinion, do nothing. Just wait for the approval. If you had sent all the documents, the IIO should not have any problem approving your case without asking for any further documents. In my case, the company name changed after my I-140 got approved and before I applied my I-485. Therefore, I got an RFE asking me to file a new I-140 with the new company as my petitioner. The message changed on June 19th. My lawyer received the RFE on June 22nd. RFE was sent back to the INS on July 19th. The message still has not changed. I will wait another week and then call and talk with an IIO. In my RFE, it clearly said that you started with company A and now you filed I-485 with company B. If your company has merged, you have to file a new I-140. In your case, the entire process was done with one company name and so you should not have any problem. Unless they sent you a RFE asking for W-2, pay stubs etc as RFE. If you ask me, just wait.
Hope this helps.