Since when I bought the 245. The LF always have a clunking noise going over bumps. I know its the suspension or the control arms. I heard that it might be just the bolts loose or overtighten from ipd technical advice? please help tech or any1!

Look at the rear of the lower control arm where it meets the body.There is a round bushing that mounts in a bracket that bolts to the body.Two things happen the bushing breaks and makes noise or the bushing slide inside the bracket making noise.
Also check the balljoint.

Good call tech..... I had the same problem with a 240, and it was exactly the bushing you mentioned, and it was doing exactly what you said - sliding around inside the bracket. $39.95 and I was on my way.
The bushing is the one closest to being underneath the drivers seat, and was quite easy to change. One more thing, the noise would generally cease under braking conditions.
Cranky

thanks ill check on that! i replaced the balljoints after I bought the car. And noise was still there.. so I'll go inspect the bushings.

the bushings look fine.. any other ideas tech?

Just look everything over really good and try moving things with a pry bar and look for excessive movement on bushings.