I saw on Tisher a cable that was supposed to be a fix for that. You might e-mail them. I don't remember what the part number was.
2013 335is Convertible
MODS:M3 Strut Brace / Smart Top Module / Ikon Lip and spoiler
VRSF Charge Pipe /
Previous: 2004 3.0 Z / 2008 Z4M