Sure, so? Is that mandatory? No. Would it require explicit user permission? Yes, as any other device or service in EU. The user or the manufacturer always have

Sure, so? Is that mandatory? No. Would it require explicit user permission? Yes, as any other device or service in EU. The user or the manufacturer always have the ability to put extra devices which do whatever, if they respect the current regulations. This has nothing to do with having eCall installed by default.