Windows and sunroof close when it rains
COMMUNITY-SOURCED · MK5 · LOCKS & WINDOWS
When the car is locked and the rain sensor detects rain, the windows and sunroof close by themselves.
Applies to
VW Golf Mk5 (1K: Golf, Rabbit, GTI, R32), 2006-2009 US / 2004-2009 elsewhere, with a factory rain/light sensor.
Not confirmed for
Jetta Mk5 (option names match, but the byte positions aren't confirmed), 2010 Jetta, Golf Plus, Audi A3 8P
Module
46 Central Convenience + 09 Central Electronics (Rain/Light Sensor sub-system). Ross-Tech lists Wiper and Rain/Light Sensor as sub-systems of the 1K 09 Central Electronics. vag-coding.net selects sub-system '2' in the 09 Long Coding Helper.
Method
Long coding
Requires
Factory rain/light sensor (RLS). vag-coding.net says the car must be locked with the remote.
1 · Before you start
Run a full Auto-Scan and save it. Copy the whole long coding string of 46 Central Convenience + 09 Central Electronics (Rain/Light Sensor sub-system) and keep it somewhere safe.
2 · VCDS
Open 46 Central Conv. > Coding - 07 > Long Coding Helper. Tick 'Rain Closing' (1 = permanent) and leave 'Comfort Closing via Rain Light Sensor (Rain Closing) inactive' unticked. vag-coding.net (Golf 5) shows both in Byte 9 (Bit 1 and Bit 2). Save.
Open 09 Cent. Elect. > Coding - 07 > Long Coding Helper. Choose the RLS sub-system from the drop-down and tick 'Rain Closing active'. vag-coding.net (Golf 5) shows it as sub-system 2, Byte 0 Bit 2. Save.
To test (Ross-Tech tips): lock the car with all doors and lids shut, wait 10 minutes, spray a little water on the sensor, and try the wiper stalk both in OFF and in Auto/Intermittent.
Notes
Ross-Tech says this may not be supported on all vehicles and that feedback varies a lot.
Sources: wiki.ross-tech.com · wiki.ross-tech.com · wiki.ross-tech.com · vag-coding.net · vag-coding.net
Reference only. No guarantee of compatibility. MK6IX doesn’t answer coding questions or troubleshoot coding. Back up your original coding before making any change. You code your car at your own risk.