RADIO and REAR CLONKING

Hi guys

Had my loverly Citigo for 3+ years now without a problem, but................

1.  It may sound stupid but does the radio receive FM stereo? I just noticed that all the radio toons sound mono? Normally there is a stereo/mono button on FM but I can't find anything in the handbook

2.  About a month ago, after only 18k but 2.5 million speed humps, I noticed an occasional clonking from the rear offside. I can only describe it as sounding like a marble in a thick plastic beaker? Suspect rear shocks but wondered if the collective cognoscenti had any experience????