erratic

My 1993 C220 Sport Auto (Petrol) has started stalling when you stop at road junctions, etc. The car seems to run fine for first few minutes from cold (& on the open road even when hot (although it "pinks" under load & going uphill). The idle also becomes erratic fluctuating between 500-1500rpm...

My c230k has a erratic idle when coming to a stop. It goes to almost zero and after a few sec goes back up to nrm. Sometimes the engine dies altogether. Pain in the *** when at junctions. Anyone have any ideals?