(1) No motor vehicle repair shop shall charge for making a repair price estimate unless, prior to making the price estimate, the shop:
(a) Discloses to the customer the amount of the charge or, if the amount cannot be determined, the basis on which the charge will be calculated; and
(b) Obtains authorization on the written repair estimate, in accordance with s. 559.905, to prepare an estimate. No motor vehicle repair shop shall impose or threaten to impose any such charge which is clearly excessive in relation to the work involved in making the price estimate.
(2) It shall be unlawful for any motor vehicle repair shop to require that any person waive her or his rights provided in this part as a precondition to the repair of her or his vehicle by the shop.