E60 530d(m57) won't start

[i2ox]

I have a problem with starting my E60 530d m57. The car was in the garage on a lift while I was trying to discover where the coolant leak was. After discovering it, I took the battery off the car and hook it up to a charger.

The coolant leak was under the EGR cooler. I took the vacuum pump off to see better where the leak exactly was and then put the vacuum pump back. There were some MPM and PDC wires broken, so I fixed these also but after putting the battery back in the car, the car wouldn't start.

Got the following engine and fuel pump codes with Carly:

Engine:
* Controller internal 4
* Camshaft sensor, signal

Fuel pump:
* Motor voltage too low / EKP engine: voltage too low
* Motor power is missing: EKP engine: power is missing
* External fault: CAN ID 0xAA (torque 3) missing (e) / Timeout CAN message 0xAA (torque 3)

Cleared the codes, only the camshaft sensor signal code came back. Today I got the sensor from another 530d, replaced it. The car still doesn't fire up and the camshaft sensor code is still present. Cam sensor is getting 5V through one of the wires.

While cranking the engine, looked in through the cam sensor hole, the engine was turning over.

What could be the possible cause of the engine not firing up?
All of the fuses in the glove compartment, trunk and engine compartment are okay. Don't know about the relays tho.

[i2ox]

So still no progress. To be sure, I tried my friends E60 530d camshaft sensor(his still works). The engine didn't start and still gave me a camshaft sensor error. For a second it also gave a EWS manipulation code in INPA. Tried spraying some starting aid to the intake but still didnt turn on - while cranking the engine, it seemed that the starting aid flew back out through the intake to the air. Could it be that there is some immobilizer problem and the throttle body/intake valves won't Open?

[PheW7]

wondering if you can update. Have you found what's the issue? aromasin vs arimidex
i have a different model - 520d, but the probem seems similar. wondering how's it going? thanks

[i2ox]

Havent figured it out yet, will update when the car runs again.

[i2ox]

Turned out that the chain had slipped. Currently in progress of replacing the engine.