What is in attachment 1282475 - how to identify the device or fault?

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The most reliable way to find the fault is to use a diagnostic interface such as VCDS, OBDeleven or ODIS, for example, and read the DTCs in module 56 or 37. The fault codes will help you identify exactly what isn’t working. Whether it’s an internal fault, a communication issue or a problem with the antenna…

I have absolutely no idea what fault you’re referring to… You haven’t specified whether this device is working but not properly, or whether you actually want to identify a fault within it at all… As for identification, based on the photos posted here:

The device is a Volkswagen RNS 315 NAR car sat-nav (North American market version)


Model: VW RNS 315 NAR

VW part number: 5C0 035 274 B

Serial number: VWZAZ2N0191593

Software/hardware version: SW 0319 / HW H58

Date of manufacture: 12/13 (December 2013)

MAC address: 90:03:B7:94:B3:7E