its a 56plate signum cdti. 120bhp with 40k on the clock.

driving home before the eml lamp came on dash.
runs fine (but only had car for 2500 miles) and did a dpf regen 2 weeks ago.

when you rev stood still it makes a funny vibration mid rev range on its way back it tickover,

ive noticed the past few weeks its slow to take off untill it hits the powerband of the turbo. and sometimes is a bit rough on tickover.

should i be worried its gonna cost lots of wonga?