5 series problem, help!!!
im new to all this, iv had my 5 series automatic for about 3 months, bought it as had always wanted one, its a 2001 model, full mot and done 100k.
tonight whilst driving home, i heard what sounded like id driven over 3 drains, a rattling metal sound. following this for a split second there was a loud chirping, squeeling noise constantly. i stopped and when reving in idle there is no noise at all, just a nice purr as normal.
so i carried on as i needed to get home, the chirping continued and then a hissing sound which was now and again. this sounded like a converter when you change gear.
i stopped for about 20 mins to see if a garage was open but not luck, so i got some petrol and started up again and continued to drive, after about 5 mins the chirping stopped and my car sounded normal again.
one thing i will mention is that it had been heavily raining, and also my car was literally empty on petrol, after filling up and driving for 5 mins the noise stopped, could this be anything to do with it as driving on a empty tank can cause more air than fuel and can cause issues.
any help would be appreciated before i take it to a mechanic and get shafted
thanks in advance