Thats your On board diagnostics port :) or OBD for short.

Oh, Ok. Cheers. red face smiley. lol

!SAID SARCASTICALLY! Yes This has been purposely put here by volvo so you can enjoy a cold beer from your fridge while you drive along . .also I here there is an adoptor to where you can also plug in your telly for entertainment purposes!!!! ah no I JOKE I JOKE!!! sorry I couldnt resist!! but yes this is your obd port!!!

I've plugged my PS2 into mine and now I can change it to any car on Gran turismo 4.:car:

LOL!!!!!!!!!!!!!!!!! thats had me laughing to myself for the last 10 minutes!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!