Felipe: I'll just find a nice quiet place to rust.
Also later in the episode:
Felipe: Maybe Manny should just melt me down and use me for scrap metal.
Poor Felipe just didn't want to live anymore. He sadly cries as he tries to end to his life. That was until Manny found him and they needed his help.
The automotive was depressed when they can't celebrate Hank's Birthday. They light the candles on his cake. They claimed they've been like this all for the whole day. Lily even had an emotional breakdown.