0 would be ideal. With everything bang on, the engine will be able to function optimally. 0* difference between cam and crank, with injection timing dead on. That will give you the best possible running.

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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
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