I've looked up many tabs for this intro and somehow they all sounded incomplete to me,
I decided to try it myself. I hope this one sounds exactly the same as the original ^^
[ Tab from: http://www.guitaretab.com/p/plastic-tree/182761.html ]
E|---------------------------------------------------------------|
B|-4-----4--0-----0------2---0---0---0-----0-0-----0-0-----0-----|
G|-----3--------1----3-----3-------------1-----------------------|
D|---4--------2--------4-------1---1---2-------1-4-----2-----4---|
A|-2-----------------------------------------2-------------------|
E|----------0--------2---3---4---2---0---------------0-----2-----|
E|-----------2---------------------------------------------------|
B|--0---0-2------------------------------------------------------|
G|---------------------------------------------------------------|
D|----4----------------------------------------------------------|
A|--2------------------------------------------------------------|
E|---------------------------------------------------------------|