the car sound is heavy while driving

Been running for 2 days after the new alternator. Fuses all ok. when I put the key (with new battery) I don't hear the sound like a zip.
Please, a little help of my friends .

Will there be any more problems

after bringing my car to my Mechanic he check it out with his computer he said all is good .today after a long drive the info board on the dash ask me to add a 1/4 of oil , i have 109.000 no smoke or anything am i leaking oil somewhere ..

I have change it three times and after a while (2 to 3 weeks) it keeps making terrible sound when on load, like air condition is on or is on drive in traffic when on stop

I have a wrecked C230 with a perfect transmission, and I saw this E320 that has a bad transmission, I found it for $800. I was wondering if I would be able to switch the Transmission from my C230 to the E320.

It has happened twice in the past three years and i did not do nothing. It started working again by its self normally.Whats going on?

mileg,110, suddenly my car starts to shake & about to shutdown,

And also when installing them how do I repair the interior?