Hi, that error was in reference to a bad brew unit.
The reason it wont go back in correctly is that there is a damaged part in the brew unit itself.
That brew unit will need to be replaced.
I will help you replace the new one once you have that part.
The best place to get a new brew unit for your machine is: Miele USA
8:00 am - 8:00 pm EST
You need to contact Miele US for a parts dealer in the UK.
They will either send you the new brew unit , or will let you knwo who carries them in the UK;-)
Its one of the harder companies to get parts from, but they can do this for you for sure.
Once you have that part, I will still be here to help you install that brew unit correctly.
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.