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Auto closing rain sensing windows and sunroof on your mk5+ vw
How to enable auto close windows and sunroof on your VW Jetta and NMS VW Passat (2012+)difficulty: 1/5
If your Volkswagen (VW) is equipped with a rain sensor and light sensor, you can enable the auto close feature with VCDS.
Before you ask why you can't enable this, as explained throughout this article and video, the car must have the rain-light sensor for this to work. If the car has auto headlights and wipers, it has this sensor. Below is a picture of the sensor. If you don't have this square thing on the windshield, you absolutely do not have the sensor. You can add it if you have a compatible central electric control module, see 1000q: auto wiper-headlight sensor retrofit for details. This feature is not enabled from the factory. After model year 2014, NMS Passats did not have the rain sensor. See the NMS Passat buying guide in this FAQ for more information and yearly differences.
To set the wipers to auto function, click the wiper stalk one notch up from off. The dial that used to set intermittent wiper speed now sets auto wiper sensitivity IF the stalk is on the auto position. The rain sensor detects water by shining infrared light out and looking for a reflection in the cameras built into the sensor. This is why the windows will automatically close after 24 hours if auto close is active - shining the light and using the cameras for more than 24 hours would start to drain the battery.
Below is a demonstration of this. Only the 2005.5 model Jetta was equipped with this on North American TDI for the mk5 generation. All 2012 NMS VW Passat TDI had a rain-light sensor and this feature could be enabled. 2013+ and later NMS Passat removed this sensor on SE level trim. SEL and higher still have this sensor. Although 2009-2011 Audi A3 premium plus have the rain-light sensor, I am told they cannot activate this function due to a difference in the control module. If you find out otherwise, please post a correction and proof in the forums.
This is not the same as the remote fob window function where pressing and holding the unlock-lock buttons will open-close the windows. That is a separate modification, see 1000q: fob-window function for that procedure. This function does not work on NMS Passat, only Audi A3 and mk5-mk6 Jetta/Golf.
VCDS tool from ross tech (required)
Procedure to activate rain auto-close windows and sunroof
First plug in your VCDS cable. Make sure the LED on the cable is green. Start the software and select the control modules.
Select the 09-Central Electric module.
There are two parts to the modification. First you must enable the option in the menu. Then you must enable the auto close feature. Make sure to take screenshots to save the original coding before you make any changes.
To enable the menu option, click on long coding and then long coding helper in the screen below. You will then see the screen bottom. You will start at Byte 0. Each menu is a byte, each checkbox changes the bits.
Move to the right through the menus until you see the option for rain closing and check it. The other one for inactive should not be checked. Close the window. Click Do it! and it should save the settings. You now have this option on the multifunction display convenience menu.
Open the CECM module again. Click the dropbox and select item 2 RegenLichtSens.
Click the checkbox "Rain Closing active" --> The new HEX code to be set is 075025 (00217125 in DEC)
Close the coding helper window
Now in the RegenLichtSense window replace the Software Coding from 00217125 to 00479279 (075027 HEX)
Click "Do it!"
On mk5, it's turned on when you activate it. If you wish to deactivate it, enter the MFD menu (see 1000q: MFD menu options for more explanations) and go to convenience. Select rain-closing and turn it off there.
On mk6, it's turned off by default. Select the checkbox to turn it on.