2013 Mercedes C200 (140,000kms)

Mercedes » C-Class » 2008-2015
Problem Description

Hello, 

the engine light came on a while back. Took it to the garage, they changed spark plugs and coil. All was well but ten days later the light came on again.

Took it to a different mechanic and they have quoted to change the timing chain, timing adjusters, timing guide, venous wheel(?), inlet and exhaust cam shaft sensors.

Does this make sense?  

NF