The timing set-up procedure for the M104 basic engine is shown in many threads and documents, for example, in the following link:

http://www.ps2cho.net/downloads/MB%20CD/W124/w124CD1/Program/Engine/104/05-2230.pdf

As noted, in the above link, the procedure for the AMG version of this engine is different.

In error, I set my engine as per the basic procedure above. My AMG engine runs fine above 1000RPM, but the idle is lumpy like a rottweiler dog pulling at a chain at idle.

Relevant differences I have noted during research indicate:

1. Different inlet cam and valve lift.
2. Different valve overlap.
3. Inlet valve opens 28 deg ATDC on AMG (34 deg ATDC C280).
4. Exhaust valve closes 16.5 deg BTDC AMG (14 deg BTDC C280).
5. Variable valve timing is 26 deg AMG (20 deg C280).

My question is...Does anyone know, or have a link to the procedure for setting the camshaft valve and timing chain for the M104 AMG engine?