gusandpam

Hi all.
A bit of help from wiser people than me would be much appreciated.
I've had faults coming up on my 2006 R350.
P0013 & P0017. Camshaft position actuator B - Bank1 circuit malfunction and Cam/Crankshaft pos. correlation sensor B - Bank 1.
I now know bank 1 is alternator side, still not sure about sensor A and B.
I swapped the actuators and sensors around to see if that would change anything.
It didn't, still getting the same messages. so its not faulty sensors or actuators.
Any ideas?
I had the dreaded cam chain and balancer shaft problem, and it was all replaced 20000K's ago.
This car is like a black hole for money, it never ends.