Plugs and plug leads are not older than one year, but importantly, they haven't done more than 1000ks
Hi Michel, are you sure about the leads ? One tends to forget, of course what maintenance you have carried out on RED 690SEL. Just keep in mind that it was probably sometime in November of 2008 (Oran Park) that the car was used in 'anger' and I don't think a lot has been done in between times. Driving, and maintenance, of an older style car is an ongoing task. There are so many components that are instrumental in providing you with a healthy, and happy engine - so, it might well be appropriate to spend some time on your car.
As far as I know, the only matter of concern with your car has been the inclination to stall when cold - a couple of times, but in due course it has always settled down well. Perhaps other issues have developed in the meantime. Regards Styria