Control Rod Travel Sensor Loose

[300TDT 1987]

My control rod travel sensor is very loose and looks to be leaking Diesel Fuel all over the place in my 300TDT W124. When I touch the travel rod sensor the whole unit moves up and down, as well as a copper/brass outer ring with many indentations in it.

Before I get into this tight spot to try and tighten it I would like some input. I'm a little worried because there are many delicate parts around and I'm not sure if I need to remove the intake manifold to tighten this down properly.

Do I need to disconect the three prong conection and will the plastic thumb tab get in the way when I try to tighten it.

Any suggestions are really appreciated.

Many Thanks,
York