my dealer installed the illuminated side sills and the sport package diffuser and splash guards. it was part of the package so i didnt get to choose.
the diffuser and sidesills they did fine. but the rear right splashguard...
wtf.
i think you can trust them, but before work show them you have no scratches (take picts even), then verify together with the service advisor after the work is done. dont drive off the lot until you are 100% satisfied.