Sounds about right. Connector D pin 11 is TEL-Mute, that's all you need to mute the RNS-E and display PHONE in the DIS. If you want to use the speakers you would also need Connector C pin 6 and 12 (TEL NF-IN).
The easiest way to get that pin should be the to contact whoever sold you the RNS-E adapter. If he can't provide the pin, check ebay.de for those who offer the RNS-E and other adapters. The local audio shop may also help since the pin in used in adapters for most newer VW and Skoda.
The easiest way to get that pin should be the to contact whoever sold you the RNS-E adapter. If he can't provide the pin, check ebay.de for those who offer the RNS-E and other adapters. The local audio shop may also help since the pin in used in adapters for most newer VW and Skoda.