The service function opening limitation can be used to shorten the opening path of the sunroof on vehicles of the E53 (X5) series. This reduces the whistling caused by wind in the vehicle when the sunroof is open.
As of approx. January 2001, the opening limitation is set at the factory on all vehicles of the E53 series.
On request by the customer, the opening limitation can be erased. The sunroof is then fully opened.
Setting opening limitation : a shortened opening path is coded in the sunroof module.
Erasing opening limitation : the full opening path is recoded in the sunroof module.