The fact that you've trimmed your bumper should make it easyer to fit.
Also it'll be there to take the impact instead of the lower trim.
What car is the guard from?
If its a 200 or 300 disco or RR classic it will fir your 300.
All the parts from my 200 fitted straight onto my 300.
The 200 and the 300 models are the same car but the 300 was face lifted for the American market.
They hated the inside of the 200
:roll: