Something weird happens!!!!!

[sub_zero]

Hi all,
My W124 was so fine yesterday ,when I drove it today,I switched it on normally,everything was OK,then when I shifted the transmission to 'D' while applying the brakes,the car started to shiver!!!!!! this is the first time I see it like this (reminded me of my old Corolla),I heard my stuff in the door pocket shivering too,even the stuff in the glove box I heard them!!!!
I have nothing to explain what is going on.
When I drove it,it was OK,just the shiver problem is too odd for me.
What could this be?
Any suggestions will be highly appreciated.

P.S. Pardon my English

 

[BlackC55]

Sounds like a missfire? Is the engine shaking?

 

[sub_zero]

it sounds normal to me.how would I know missfiring?
does missfire affect the driving smoothness and engine power?
it runs like before but smoothness is less.