Car smell...

[noidea0]

probably completely the wrong place to post ..so apologies!!I have got a Peugeot partner tepee on a 13 plate  the problem is that someone (dont read this if at meal time!)has been sick in the back of the car and I mean big time...this was quite some time ago..cleaned up ,and scrubbed out,however the smell still lingers especially on these sunny days.Ihave used bicarb,pet odouruiser the lot..thing is I believe thereare still traces under the passenger seat runners wher it is mounted into the car ..so looking at taking the front passengers seat out to scrub carpet ..What electrics are involved ..think there is an airbag plug in fitting..any special way or things to take into consideration while doing this  thanks