I would advise you
I would advise you against it.
Ich riete dir, einen Anzug zu tragen.
I would advise you to wear a suit.
Ich riete dir an, dich bedeckt zu halten.
I would advise you to keep a low profile.
Ich riete dir, dich umzuziehen.
I’d advise you to change clothes.
Ich riete dir, hier zu verschwinden, solange du noch kannst!
I'd advise you to get out of here while you still can!