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Discussion Starter #1
I see fragmented threads about the post dead battery (renewal) reprogramming that is required for the steering wheel sensor, the panoramic sun roof, the auto window and pinch protection function... However, what is the impact to the VCDS, with regards to setting changes: power window open/close from the remote key fob, euro light switch mod settings, disabling daytime running lights...? Does the VCDS have a "keep alive memory" system that holds these settings or are all of these customized settings lost?

I ask, because it would be most inconvenient to have to bring in my laptop to reprogram the VCDS while renewing a dead battery in a parking lot where the death of the battery occurred. I am not concerned about the loss of the convenience settings (windows...), but if the euro headlight switch mod requires VCDS programing and the customized VCDS programing are lost, will you loose headlight control with the euro switch mod until the VCDS is reprogrammed? I want to ensure that I don't customize my 2011 JSW TDI beyond a 'practical' limit.
 

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All of these settings are coded in the memory of the car's modules and I believe they will remain even if you remove them from the car. There are a few settings which are reset like the one touch windows and power seat memory settings.

The one touch windows are reset by raising and pressing up one more time, and lowering and pressing down one more time on each window.

The power steering calibration is also reset but it's done just through normal driving. Officially you're supposed to use VCDS to monitor the status and drive 20 feet foward in a straight line but it does it automatically,. http://www.myturbodiesel.com/1000q/a5/steering-adaptation-VW.htm
 

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Well when I took mine back to the dealers last year to have the digital gear indicator enabled they couldn't. They said they tried disconnected the battery so it resets all setting back to factory basic but that didn't work either. I didn't have VCDS then the only changes I did were through the MFD menus plus the DRLs were disabled as they still were when I drove away.

So is the more dealer :BS ?
 

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Discussion Starter #4
So all of the customized settings were retained, despite the dealer's "master reboot" attempt? That is a pretty strong indicator that the VAG-COM is built with 'non-volatile' memory.
 
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