Hello. Here you can find a guide on how to remove the front and rear bumpers
[Edited to change the website link to a google translate version]
https://remont--bampera-com.translate.goog/mitsubishi-outlander-3-posle-2012-goda?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp