(62)In order to ensure that there is transparency, certain requirements as regards commercial guarantees should be provided, alongside the pre-contractual information requirements on the existence and conditions of commercial guarantees set out in Directive 2011/83/EU. Moreover, in order to improve legal certainty and to avoid consumers being misled, this Directive should provide that, where commercial guarantee conditions contained in associated advertisements are more favourable to the consumer than those included in the guarantee statement, the more advantageous conditions should prevail. Finally, this Directive should provide rules on the content of the guarantee statement and on the way it should be made available to consumers. For instance, the guarantee statement should include the terms of the commercial guarantee and state that the legal guarantee of conformity is unaffected by the commercial guarantee, making it clear that the commercial guarantee terms constitute an undertaking that is additional to the legal guarantee of conformity. Member States should be free to lay down rules on other aspects of commercial guarantees not covered by this Directive, for example on associating debtors other than the guarantor with the commercial guarantee, provided that those rules do not deprive consumers of the protection afforded to them by the fully harmonised provisions of this Directive on commercial guarantees. While Member States should remain free to require that commercial guarantees be provided free of charge, they should ensure that any undertaking by the seller or the producer which falls under the definition of commercial guarantees as set out in this Directive complies with the harmonised rules of this Directive.