It doesn't matter who's right anymore
All this bickering does is lower the credibility of Tesla dramatically. People haven't forgotten their (lost!) lawsuit against the BBC (Top Gear). And those same people are very likely reading all this thinking "here they go again...".
Its a given that companies who produce a product aren't very keen on bad reviews. You see this happening a lot in the gaming market where some companies actually push out some extra bucks in order to get positive reviews. This was already the case in the C64 era (games magazine covering $new_game and being very positive about it while also featuring 2 full-page ads for that same game. Yeah right....) and it still holds true today.
But the last you should do is start a public fight. As this article well indicates; the people are left in the dark about who's right (they can only speculate), it only costs time and money and in the end won't change a thing. At best you can simply get other media outlets to give this car a trial run.
Maybe Top Gear US would like to have a shot at it? When looking at the massive downvotes those guys got on YouTube I'd say it could be a win-win combination ;-)