Ich gehe davon aus, dass der "Windlauf" verriegelt ist und nicht der Hallsensor.

Hallgeber, m (Kfz.El.Zünd); Hallsensor, m
- Hall generator, m
- Hall element
- Hall-effect sensor
- Hall sensor
- Hall-effect pick-up

Windlauf, m (Kfz,Kar); Lüftungsblech, n; Windlaufblech, n
- cowl AE
- scuttle BE
- cowl panel AE
- windscreen support panel BE
(Das Blech direkt unterhalb der Windschutzscheibe, das den Übergang zur Spritzwand im Motor bildet ... )
(Fachwörterbuch der Kfz_Technik)

Domain Land transport
Domain note NT1 road transport,NT2 vehicle fleet,NT3 motor car
de
Term Windlauf (m)
Reliability 3 (Reliable)
en
Term Scuttle (area between bonnet and windscreen) (US: cowl)
Reliability 3 (Reliable)
Term Ref. Audi Germany Workshop Manual Terminology, EN Translation Dep., 08.07.99;
Term Note Audi comment: Use this terminology carefully
http://iate.europa.eu/SearchByQuery.do?method=searchDetail&l...

Domain Information technology and data processing
de
Term Hallsensor
Reliability 3 (Reliable)
en
Term Hall effect sensor
Reliability 3 (Reliable)
Term Ref. Reg. 1572/93 (1) OJ L 156/93 p.53 Reg. 1556/95 (2) OJ L 152/95 p.88
http://iate.europa.eu/SearchByQuery.do?method=searchDetail&l...

Ein Hall-Sensor ['hɔːl-] (auch Hall-Sonde oder Hall-Geber, nach Edwin Hall) nutzt den Hall-Effekt zur Messung von Magnetfeldern.
http://de.wikipedia.org/wiki/Hall-Sensor

Hall effect sensor
A wheel containing two magnets passing by a Hall effect sensor

The magnetic piston (1) in this pneumatic cylinder will cause the Hall effect sensors (2 and 3) mounted on its outer wall to activate when it is fully retracted or extended.
A Hall effect sensor is a transducer that varies its output voltage in response to a magnetic field. Hall effect sensors are used for proximity switching, positioning, speed detection, and current sensing applications.[
http://en.wikipedia.org/wiki/Hall_effect_sensor

From what I understand is there are only four sensors. The Softtop Floor, Softtop Lowered, Softtop Closed, Softtop Scuttle Released and Softtop Scuttle Locked.

I think the Scuttle is the locking mechanism on the front of the top. My 03 does not have the Hardtop Locating Point Hall Effect Sensor.
http://www.bimmerfest.com/forums/showthread.php?t=384884

Hall generator
A pulse generator that makes use of the Hall effect and consists of a rotor with vanes, a conductive element with a permanent magnet and the Hall IC. Also called Hall element.
http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=...