The validity of the weatherproof guarantee requires an annual control by a Bürstner contractual partner. This must be done annually after the date of the warranty start. You have a margin of one month before or one month after this date.
The costs for carrying out the water ingress test are to be paid by the owner of the vehicle. Claims under this warranty only exist if the performance of the annual water ingress test by an authorized BÜRSTNER authorized workshop has been duly proven.
If a water ingress test, for whatever reason, has not been carried out, the warranty conditions are no longer met.
Even if the weatherproof guarantee has expired, we still recommend the annual control. This is important to identify eventual leackage and to have the possibility to apply counter measures within short.