Needle-lift Sensor Injector Position
 

I have a black smoke problem with my 1998 E290TD leading me to change the injectors (after 124000 km). The technical in gformation I have received, including advice from local Mercedes agent, indicates that this injector should be fitted in No 2 cylinder whereas, at present it is fitted in No 1 cylinder.
The car operates well (apart from the black smoke).
By changing the position of this injector am I likely to have timing or other oroblems?

By changing the position of this injector am I likely to have timing or other oroblem
 

Most likely, no.