[Gordon4499]

My old 530 had the M Sport suspension deleted so I did notice an improvement in the handling of the 535 with the VDC fitted however, after a couple of months driving I can’t honestly say I notice any difference between the sport and comfort modes. I would describe the ride as firm in all modes so I am starting to question if the system is working as it should?

Is there any obvious way to check if it’s working or am I expecting too much from the VDC?

It doesn’t help that the North East roads are like ploughed fields!!

Thanks in advance

[MrPogle]

I would say that if you can't notice it is probably broken. Drive over a set of speed-humps at constant speed and switch from sport to comfort after 3 or so. Ask a passenger, with their eyes closed, if they can tell. I have VDC and not AD but I can easily tell the difference just going round roundabouts.