Greens and purples are probably the speaker wires for the rear channels from the HU. Double check your wire count - maybe 13?

2 each per speaker = 8 (wht, gry, purp, grn)
1 steady +12 (maybe yellow)
1 switched +12 (maybe red)
1 ground (maybe black)
1 "headlight" dimmer (maybe orange)
1 antenna (or amp) probably blue

These are mostly standard aftermarket colors now, so check online to verify. I'm going from memory. They do NOT match the factory colors. DO NOT just connect the same colors from the HU to the car.

The antenna connector to the switch is probably black with a female spade connector, but it may be blue/red.

Read here for a long discussion on fixing an aftermarket install: 240d frying radio fuses

Also - check the fuse for the antenna, check the plug for the antenna in the trunk. Or you may have a busted plastic aerial cable so it could be wired correctly, just in need of a new mast.