Hi All, I bought Mercedes C 180 Bluefficiency 2011 (40,000 miles) almost 7 months ago. The car drives okay, no power loss everything is in good condition - I was very happy till yesterday. Few months ago engine light came up, and then it went away by it self second day. And then again few weeks ago it came up and then went away the next day. I decided to buy obdII code reader and see for my self what the code is. The code was P0340. Googling this I came to know its P0340 Camshaft Position Sensor Circuit Malfunction. I thought I'll get it checked. So yesterday I took it to Mercedes for service A and also told them about this light. At that time the light was off, so they told me to forget about it and only worry when it's back on. I said ok. They carried on with service A. And when the service was done, they said the light was back on. So they are checking it now. And it's after this check I am feeling very disharted: they said they are not 100% sure they will have to investigate it which will cost around £600 for investigation and if it is what they are suspecting then this will cost about £2600 on top. They were saying that they may have to take of and adjust the timing chain. They said the light is off now, it may come back on again some day. So I can go for now, and come back when I decide to get this fixed. It will take 3 days. Am I in trouble? Should I get this fixed asap? Will my car one day stop working on a long route? Is it really going to be that expensive fix? P.S. I drive only on weekends - since last 7 months I only did 2500 miles. Thanks in advance.