Ideal setting, preload
WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Pre-tension can be checked with or without weather strip. Pre-tension is 1.0 mm less with weather strip.
Insert the special tool 51 0 370 in the rotary striker of the door lock and close the rotary striker manually (activation of the short stroke).
Close the door carefully up to the point where the special tool 51 0 370 magnetically adheres to the striker (= defined door opening angle for measurement).
No force must be exerted on the door or door window glass during measurement.
Slide the special tool 51 0 342 at a distance (B) to the door window glass side edge into the seal (up to the body flange stop) and measure dimension (A) to the outside edge of the door window glass (2).
Dimension (A) with weather strip:
A = 65 ±1 mm
Dimension (A) without weather strip:
A = 66 ±1 mm
B = 10 mm