Replace it, I just did both of mine (Fuel pump and Pressure Regulator)..on the E90, the Fuel Pressure Regulator is notorious for cracking on the top and leaking a bit of fuel, which was the case for me. I did both just because I drive a 2008 with 130k miles on it, your car is much newer so you may only want to replace the faulty part, not both.
That pic looks dangerous, That is leaking directly on a wire with an electrical charge.
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