Code P034062 Repair

[dilli123]

Dear Members
I am a newbie to this forum. I have a C180 - 2011 Reg Petrol which has run 35K. All services done @ MB Dealer. i got an Yellow engine Management light on the dashboard. I took to a Merc specialist (independent garage) near my home and checked the code it was P034062 The Position Sensor for the intake camshaft (cylinder bank 1) has an electrical fault. The signal comparison is faulty.
And the Merc specialist (Independent garage) cleared the error code. After 24 hours it has come back again and the Specialist thinks this is not a sensor or wiring issue. He says after listening to the sound of the car, he said most common cause of this on this engine is a timing chain issue. The timing chain on this engine is notorious for stretching and causing codes such as this one without causing any noise or any other running issues. and it needs Timing Chain and Tensioner needs replacing.
As it is a big job, i want to ask the forum members if they had the same issue or come across this issue.
As for the car is concerned, there is no power loss which i can notice or any other issues. But while starting (cold start) i have noticed it takes few more seconds then normal.
I took the car to MB dealer to have a second opinion, they said it might be a 1) electrical fault , 2) electrical lines between control unit N3/10 and y49/1/cam sensor 3) Y49/1 intake camshaft solenoid . They advised me to check these and rule out first before going for a change of Timing chain and Tensioner.
Any help appreciated. Thanks

 

[exvolvoman]

35k and needs a timing chain? I'd be seeking a second opinion...I wouldn't have thought a worn chain would bring on the EML
I'm sure the experts here will have more info for you.

 

[Terry_]

It will be the chain or intake camshaft gear I would think. It is common even at low miles

 

[pembssurf]

Very likely to be cam gear / chain stretch. Indy sounds spot on and is an inherent weakness of this engine. I had the same year model/engine as yourself and got rid of mine this time last year with 60,000 miles on and replaced for a CDI because I was always worried about this problem occurring. Best way forward is to do the extra checks in f you want to be 100% sure and DO NOT RUN the engine again until it is ready to be repaired unless you want to risk destroying the engine. Sounds like you have got away with minimal damage thus far. Either way you are staring at a fairly hefty repair bill I’m sorry to say!

 

[dilli123]

It will be the chain or intake camshaft gear I would think. It is common even at low miles

Thanks, will keep posted.

 

[dilli123]

Update - Daimler finally agreed to fund 70% of the repair as a goodwill gesture. It was the Chain stretch and they had to change the Chain, Tensioner and Camshaft adjusters. But even after MB paying 70% it is a huge bill.
Thanks for all your replies.