6 months, still no help from mechanics.

[dindy]

first of all happy christmas from malta, i got a sicky issue. spent alot on my vitz for idle issue. im thinking of selling it now, no help and no improvment due idle control valve, spark plugs, air flow meter, changed and original. as im driving no trouble at all!!!! but as i stop on drive position and hold by pressing the brake , it comes really shaky when on idle!!! almost wanna trun off. but if i put it on normal (free) and press the brake no shakes. then as i select drive, it shakes and vibrate......always with the brake pressed..... im getting sick of this issue. no one can find whats wrong. no codes. i will be very happy if you can assist me on this issue. before i have to say bye to my toyota. (1.0 auto 4 cylinder)