I want to learn as much as I can off you guys so heres one for ya. When the Car gets to 15mph I hear a clunk sound which seems to be coming from the wheel front (maybe near the passenger wheel?) only does it once and only after the engine has started. If you turn off the key and start it up again the drive off to 15mph it will do it again. Ive turned off TRACS and doesnt make a difference so any ideas??

ABS self check.

do u mean there supposed to do this?? can it be stopped?

Yes & no.

A bit on the loud side it is. How come the 850's didnt do it? is there a fuse for the thing.

It's an integral part of the ABS system to make sure it's working as it should be. Many modern ABS systems do it in one form or another. Cheers, John

Might be a CV joint. If the car pulls to one side have a look at the lower wishbone pivots.

My 850 T5R does it, not too loud, but you can hear it.

I think ABS might be a red herring here. My 855 does something similar and I think it may be the top mounts.