Audi SQ5 Electrical Failures: Nav Dead & Multiple Warnings

I had a very similar situation with my 2012 S5 last year. I have some experience working on basic car maintenance, but electrical issues are definitely outside my comfort zone. The symptoms were nearly identical, dead navigation and multiple electrical warnings. After a diagnostic check, it turned out the car was indeed stuck in transport mode, which can happen after battery disconnection or certain software updates. The dealership handled it under warranty since the vehicle was new. They performed a complete car configuration reset and reprogrammed several control modules. The process took about 2 hours, but since it was a software-related issue, no parts needed replacement. For your specific case, I would recommend getting the following details to help diagnose the issue better: Have you had any recent battery work done? Did the issues start suddenly or gradually? Are there any specific error codes showing up? Has the car had any recent software updates? Do you notice any issues with engine start or other electronic systems? Getting these details would help determine if your situation matches what I experienced and could point toward the most effective solution.

Last service completed at 173000KM. The transport mode issue you described matches my symptoms exactly. After reading up on car electronics forums, I found this is surprisingly common in our platform. My issue started right after replacing the battery, which seems to be a trigger for these electronic gremlins. Getting multiple error codes but mainly related to the MMI system. The automotive software definitely seems to be the culprit rather than any hardware failure. Will try getting it diagnosed specifically for transport mode activation since everything points in that direction. Curious if a software update alone might fix it or if complete module reprogramming is needed.

Thanks for the additional details about your SQ5. Your symptoms following the battery replacement match what happened with my S5 perfectly. The immobilizer and general vehicle settings often get confused after power loss. The critical thing I learned from my experience was that a simple software update alone wasnt enough. The system needed a complete module reset and reprogramming to properly reestablish communication between all control units. Key things from my repair that might help your case: The workshop had to perform a full system adaptation after the battery change, Several control modules required recalibration beyond just a basic software update, The transport mode had to be manually deactivated through diagnostic equipment, The MMI system needed a separate reset procedure Since your engine start and basic functions still work, this reinforces that its likely a software configuration issue rather than failed hardware. My repair cost was around 450 Euro for the complete reprogramming service, which was much better than potentially replacing modules. Given the matching circumstances with the battery change, I strongly suggest having a professional diagnostic shop handle the reset procedures rather than attempting DIY fixes that could potentially cause more car electronics issues.

The transport mode issue you mentioned matches my situation perfectly, this is exactly what I needed to know. The battery replacement being a common trigger makes complete sense now. It's good to hear the car configuration reset fixed your vehicle without needing expensive hardware replacements. Based on your repair experience, I'll contact a specialist shop to handle the complete module reprogramming rather than just requesting a basic software update. The 450 Euro cost seems reasonable compared to potential module replacement costs. Since my key fob and basic functions are still working, I'm now confident this is primarily a software configuration issue triggered by the battery change. The immobilizer and vehicle settings getting confused after power loss explains the multiple error codes I'm seeing. I'll make sure to request both the MMI reset and full system adaptation you mentioned when I take it in. Really appreciate you sharing the specific repair steps, this will help ensure the shop performs all the necessary recalibration procedures to properly resolve the issue.