ovp

Hello looking for some help. The car seems run rough when at idle and wants to cut out and sometimes does, and gets worse when pressing accelerator, but once up at speed it's fine, could this be the OVP relay? (I have ordered one) however I was told it could be the idle control valve. However...

After bringing my 124 E320 out of hibernation I found that the ABS light stayed on. I searched the forums on this excellent site and realised that it was probably the OVP relay. I charged the battery and checked the 15amp fuse on the top of the relay but neither solved the problem. I then...