OM648 swap into a w123
OM648 swap into a w123
Same thing happens on earlier 613 family.. there is pre-glow and after-glow time period in ECU somewhere, you have better luck finding it in EDC16. But thing to give a tough.. it should not smoke in stock condition so probably something is shot on your engine friend. Ours smoke bcs of low compression and bad mixing with machined down pistons.