Mark is right. I replaced the ccv valve on the rear of the intake, it fixed the problem. It was never changed by the previous owner at 150k km it was overdue. A very common component to fail.
Now the Engine starts and idles well no matter how cold it is, before it was replaced it would stall sometimes, lots of white smoke and flickering cell light.
It had failed and oil was flooding into the intake, not too difficult but time consuming and it's easy to strip the 7 torx bolts. While I was back there replaced all the heater hoses, sucking jet pump valve, brake booster line, etc. If it's due flush all the coolant from the block too.
Check all the other vacuum lines, I found one loose. Next I am changing the air intake gaskets and cleaning the maf.
Nothing like a smooth running m62