Car: x'06 2.2 EX FK3 Milano
Join Date: 29th April 2014
Thanked 4,155 Times in 3,851 Posts
Doh yeah, good point about being stationary.
Indeed, could well be one or two tired engine mounts.
Does the engine run nice and smooth, well serviced, etc. A dodgy injector, glow plug, sticky EGR valve, inlet leak might cause uneven idle.
A dynamic HDS test can check various components but before you go there have you cleared and checked any error codes?