(2) Upon completion of the repairs, obtain the customer's signature or initials to an acknowledgment of notice and consent, if there is an oral consent of the customer to additional repairs, in the following language:
"I acknowledge notice and oral approval of an increase in the original estimated price.
__________________________________ (signature or initials)"
Nothing in this section shall be construed as requiring an automotive repair dealer to give a written estimated price if the dealer does not agree to perform the requested repair.