Originally Posted by WutangRS
coming in through the rear lights tail etc and running down then under the seat maybe
Thats what mine was on my series 1, the rear light seal was fooked and water was running in acroos the boot floor, down the rear bench and into a (big) puddle under/behind the drivers seat. For the cost of a seal its deffinately worth trying, i found it by pulling the boot carpet out and rear seats and got someone to pour bucket after bucket of water over the rear. HTH