Hi,

I have a 1993 300e. Along the underbody on the driver side, there are 4 lines. Can someone confirm that the left most line is the brake line and the 3 other lines to the right of it are fuel lines. Anyone know what the differences are between the 3 lines.

Since I see alot of rust on the 3 fuel lines, would it be recommended to just cut out and splice the rusted portion and attach the new lines with stainless steel hose clamps and fuel injection hose or should I just bite the bullet and replace the fuel lines end to end.

I have been getting about 15 mpg with AC on in city driving. Is this normal?
I have replaced the spark plugs and O2 sensor. Should I change the air filter? Would a problem in the fuel lines cause low mileage?

Thanks,
Bolon