my issue is the car gets wet when i park on a hill when facing up. my mechanic told me he have to take my interior out to fix it. how do i fix it w/o having to do that.

 

you need to find out where is leaking 1st...more info would help

 

Sounds to me like it is the A/C evaporator leaking. Does is make sloshing sounds when you make sharp left or right turns? How about a funky smell?

If that's the case, you're going to need to unplug the evaporator to let it drain. Use an old wire coat hanger - locate the evaporator drain hose on the interior fire wall of the front passenger floorboard. Remove the hose from the evaporator (give a gentle tug), poke the coat hanger into the evaporator - SUPER gently, then as water starts to drain, shove the hose back on quickly.

After this, you'll need to remove the seats, center console and carpet. You'll need to pine-sol and shop vac the floorboard, steam clean or scrub with Clorox colorsafe bleach the carpet and then reinstall.

It's a crap job, took me about 7 hours, but it was well worth it.

 

If it is from the evap (pass side), you can just "rig" up something on the shop vac and suck out the water and junk from the drain tube. Less likely to poke a hole in something.....still have to get the carpet and that clean.
If it is coming from somewhere else?...a whole new story.