yeah the BPE5S are a totally different plug....I accidentally bought some (brought them back)
My car has been running awesome using cheapo CHAMPION RESISTOR spark plugs. It pulls hard to 115+ mph.....and gets 22mpg cruising at 72mph. I'm gonna say thats plenty good.  Fires right up even when its like 0F out too.
The Bosch non-resistor plugs I had in a while back ran like crap after about 50-60 miles. I have about 1800 miles on the champions, and they still work great....no fouling.
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-diesel is not just a fuel, its a way of life- 
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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