How did you get on with the problem. I have just found this peeling paintwork problem with my c250 60 reg vehicle, again its a red one. It's not been serviced with mb either so I am worried they won't help me.Claim has been sent to Mercedes for mine as the car is no longer under warranty. I will know next week hopefully. I am worried now, I did a quick check and found another panel with the same issue so not just the bot lid. It is getting worse too so if Mercedes turn the claim down I will be looking at a massive expense to fix this.
I think we might need to get organised and perhaps get some information from another forums to strength our case as this is clearly a paint defect. I'll try to get some pics here so we can compare the issue between us too.