NGK are terrible as well. Got 2 sets of them, the first time as I didn't know, the second time as I had a choice, They lasted more or less 6 month...
All berus now

__________________
E300TD year 2000. RUSTY SOLD
cost a fortune to maintain on the road
but run well on WVO
Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long?
Third lasted a month then went away...
Fourth now... Corroded too...