Hi nigrob
DWP will look at the whole claim so potentially you could loose what you have already received.
You need to check out our guides before going down the MR route.
I have asked at MR for only one component to be looked at, but that does not guarantee that they will only look at the one component. I usually put for instance, that I agree with how the mobility has been awarded, but have issues with the daily living due to ....... XYZ, this does not always work, and you have to be fully aware of the risks.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems