Since I haven't got any response from the C32 forum, I am posting my question here.

Recently I had my fuel pump replaced and I thought all was well. Then one day, after hearing some loud creaks from the front suspension I decided to investigate by pressing down on the front and rear corners of the car. I was able to hear what appears to be fuel hitting against the walls of the fuel tank, like shaking a water bottle. I hope I am not overly paranoid, but the family's E320 didn't make this noise. Is this normal?

 

if it is gettin warmer out where you live... it could just be the bushings on your sway bars. If the squeeking takes a while to occur and needs time for the car to 'warm up' before it happens... then it could just be the sway bar bushings..

As for the liquid sloshing around... that doesnt sound incredibly impossible?

good luck.

-j0hn