Hello, now I am very confused about the tips of fitting provided by BERU


From their web site :
here we have the 'Tips on Fitting' : http://www.beru.com/english/produkte/gluehkerzen/einbautipps.php

"BERU recommends: Before installing the glow plug, grease its shaft and thread with BERU special glow plug grease."

Ok

afterwards looking a little bit further on the Diagnostic Aid , here another info completely different :

http://www.beru.com/english/produkte/gluehkerzen/diagnosehilfe.php

"The threads on all BERU glow plugs are nickel-plated. In this way seizing of the glow plug is reliably prevented. Thus, under no circumstances oil or grease the thread!"
So, now ( really humbling ) what in real life LOST friends do ??

We add a little anti-seize to the threads, it seems to ease removal down the road.

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