First of all when I bought my sc400 the owner told me straight up that he filled it up about 4 times a month only 2 being premium the other times regular is this okay? Does it really matter? Should I buy something to clean out any "sluge"?? And only use premium?

Problems:
Power antenna stays always up never goes down when I shut off the car I hear this sounds as if it sounds like it's going down but it doesn't radio is very clear.

My climate control is broken I believe isn't it suppose to be auto? I have to manually turn the **** to my desire and it wont change no matter what the outside temp is unless I turn the ****. Works fine if I manually do it. Just curious if that's an easy fix

My key and door lock button on the inside only works for my passenger side my driver side needs to always be manually locked and unlocked the key or the button inside the car won't activate it.

Also my screen has this dark smoked black line across it I can kind of see through it on really bright sunny days

Looks like this:Where that black line is.


My car been sitting in my garage for a while I wrecked it and I have the parts just need money for the labor. I thought Id try to fix these minor problems as well.

Sorry for the long thread ha thanks all

 

Hey welcome...
well, for your Power antenna. The motor for it is dead. if you dont want it up just push i down with your hand, and you will still be able to hear your music clear...

And the A/C,if you push the *** for the a/c it will turn on to auto.

and the other stuff just search.....