Mine did this a while ago. The warning goes off when you turn off engine, only to reappear after about 20km driving. In my case it had to to with "PDF fluid". See thread on same issue on forum.
V10 MY08 Black Magic, 18" wheels with 255/60R18 Conti A/T tyres, sunroof, OEM towbar, reversing camera plus, RNS 510, leather trim, heated seats/mirrors, air suspension, black piano ins, brake contoller, UHF(Icom 440), HF (Icom 706), low range, bonnet protector, headlight protectors.