After the vehicle sits overnight (cold engine), during idle, the engine okay, no skaking, once I press on gas padal engine starts vibrate and shake till around 1600 rpm (video attached) . This cycle goes on and only stops when the engine becomes hot (drive about 10-15 minutes).
When driving cold, I notice that the engine also hesitates and shakes till I push more gas (1600-1800 rpm) then shaking disappeared.
It happens each acceleration.
After 10-15 minutes driving, the problem disappear (no shaking the rest of the day) till the next day.
Any idea what is the problem? Any direction?
My car is 2011 BMW X6 40d with 83,000km
Scanned and no errors or faults.
The car serviced at BMW dealer, all filters and oils changed yearly.. The car serviced very well.
Please watch video while car is idle