450 SEL: Question about lines under left side-rear

[bobboyer5]

Friends:

My vehicle (for thsoe who don't recall) is a '77 450 SEL (Euro) with about 69K on clock. Thin bumpers; cloth seats; you know the drill. anyway.....

while replacing 2 short left side fuel hoses (I think fuel) yesterday, I again noticed that there are 3 metal lines grouped all together running together down left side of car. Can anyone definitively identify these 3 for me?

Thanks!!!!!!

Reason: when I replaced those 2 short hoses (one of which was for sure the fuel return line), not only did my gasoline smell disappear, but the car definitely rode firmer and had less lean from rear corners. Could some of these lines be some sort of load-levelling system?

[jim16671836]

You might get your car up on a lift or jack stands and try to follow the 3 lines...I have a 1974-450-SLC and it has 4 metal lines that appear about 2 feet in from of the rear driver's side tire and continue towards the rear...
One of them is the brake line and can be followed back to where it tee's and feed the 2 rear caliphers...
One of them goes back to the gas tank and is the return
One of them goes back to the fuel pump/filter and is the fuel supply
One of them goes back to the gas tank and I am just guessing that it is a vent...where the 4 lines first surface in front of the rear tire their is a something kind of shaped like a figure eight and I think this might be a vent but where it comes from I cannot say but it is one of the 4 lines and can be traced back to the tank...Does anyone know???