Renault Clio 16V
My 1.2 16V has had a loud hum for several months now whilst driving; changing frequency depending on the speed and really damn loud. On top of this, it struggles to accelerate. Once it gets to speed it can keep the speed fine, it's just very loud. I've got it booked into the garage for Thursday for them to take a look, but before then, does anyone have any ideas? My suspicions are exhaust and clutch, though I'm nowhere near a car expert so advice would be appreciated!