Driving my F30 320D M-Sport along the M4 yesterday I was aware of a background high pitched noise which commenced at about 55/60 mph.
I thought at first it was the radio on v.low volume. But the radio was off.
The squeal was intermittant and steadly got worse until, much to my embarrassment, my passengers eventually commented.
The sound was metallic, sounded like either a brake pad rubbing or a rotating part short of oil. But I don't know.
Kept the speed down to <55mph.
This AM phoned my BMW Main Dealer who said he would collect the car next Monday.
Strange thing is, today there is no squealing!
Took the speed briefly up to 80, no prob.
Anybody any ideas what the squealing could have been?
Not sure whether to cancel the main dealers collection.
PS The cars done <1000 miles.