Sorry to hear it's not going to plan John, I know the frustration you must be feeling all to well. I seem to be making some rapid progress with mine, possibly because I gave up talking to the dealer & went direct to MB HQ. I don't want to go into too much detail on an open forum as yet for various reasons, but if you want to drop me a PM (I believe I can't do that yet?? as I'm pretty new on the forum), I'll give you an insight as to the action MB are taking & the questions I have asked. Maybe you will think of something I have missed?? Once I've got some actual results, I'm happy to share if it gives anyone else a helping hand. But for the time being, I'm just being careful incase I need to up the anti with some legal action if that makes sense? Regards, Andy.