Fuel rail coupler disconnect? 2001 V70

[regierart]

What's the trick to disconnecting this guy, please?

[abscate]

The metal clip comes off, and then use a 'fuel line disconnect tool'

I am not making that up.

I made one from a 50 USD Snap On AC tool in the P80 thread, but you can buy the FLDT from Lisle at your FLAPS for about 15 USD

Lee also has a trick with a ballpoint pen but into two that works if you thread scour.

Visual - the dome shape has four pieces of spring steel that press on the inserted tube - you need to 'flower the springs' out to release the tube - all four at once.