Thanks for your comment.
Yes, when I wrote engine failure I was thinking more literally of the engine failing to start. Sorry I'm not sure of the technical nuances of the failed engine (fuel pump vs other parts etc..)
I had to get the car towed to the local Mercedes service center (only one in town)
They quoted that amount for the repair (incl. diagnostics and labour)
It does seems quite expensive to me.
I wondered about the fuel pump relay too. I asked them about the relay and they said the relay was fine and that is was a fuel pump fault.
They said when they replace the fuel pump they replace the relay too, so it comes as a set.
Currently the car is in their workshop, so I need to wait for them to do the repairs.
I had another issue with the car a month ago that cost another $1,000 to fix and that was just a broken rear passenger door handle! ( http://www.benzworld.org/forums/w245...le-broken.html
Not liking the maintenance requirements of the car so far, after 3 months ownership.
At this stage, seems I just need to wait for the repairs to be completed (again).