Q: CHECK ENGINE LIGHT ON

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When I diagnosed the car, it reads as 1-4. Code- P0016 and P0017.
Code1:P0016-crankshaft position-camshaft position correlation Bank 1,Sensor A confirmed.
Code 2: P0017-crankshaft position-camshaft position correlation Bank 1,Sensor B confirmed. Code 3: P0016-crankshaft position-camshaft position correlation Bank 1,Sensor A pending. COde 4: crankshaft position-camshaft position correlation Bank 1,Sensor B pending. But when I erased the code, the check engine light goes away as I started the car but afterwards, when I switch off the car & restart it , it comes on after 5- 10 seconds.

my question is what really wrong with car and what parts are needed(if any) to fix this problem Thanks

My car has 109350 miles.
My car has an automatic transmission.

The on board diagnostic (OBD) sets a pending code each time the ECU detects a problem. It confirms the code if it sees the same problem twice. So you’re really only dealing with the two codes : P0016 and 17.These codes are telling you that the timing between the crankshaft and the camshaft are off on Bank 1 (the driver’s side) cylinder bank. This could be a sensor error, a problem in the reluctor ring on the harmonic balancer, or a timing chain problem. Without doing a thorough diagnosis, it’s impossible to say what parts specifically need to be replaced. If you contact Your Mechanic, they can send a technician to your home or office to investigate the codes on you Mercedes and then let you know what it will take to fix it.

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