My WIS is on the fritz (literally - it started up in German the other day and won't load in English now) but I did look in my "Pocket Guide" and it also says 40NM for the injectors and 23 NM for the hard line nuts.

I'd be very reluctant to turn those injectors another 1/4 turn after 40 NM since they really seemed to snug up fast and you are tightening against the pre-chambers set into aluminum.

FWIW the 40NM seemed to work fine in mine - I've driven it about 500 miles since the injector replacement and there's no leaks evident.

I suppose Roy could have a more up to date spec or something issued special for the turbo engine rather than the generic spec for all 606s but when it comes to torque in those heads I would rather err on the side of caution I guess.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz