Has anyone in here had tried the beru spark plugs? Is it much better that bosh? Is it true that this is much cheaper than the other well known brand in the market for spark plugs?

beru, bosch, and champion is what is recommended in my benz owner manual. I have heard some members on here mentioning ngk are good plugs too. I have only used bosch personally though because I get mine at the stealership because non-resistor plugs are hard to find and that is the only brand they sell me.

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1990 190E 3.0L

Beru are fine and if they're listed in owners manaul for your car they are great. Anything not listed really isn't a candidate.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

I'll be installing a set of Beru S1K Silverstones in my twin turbo M103.
The Silverstones were a non resistor plug with a solid silver electrode.
I don't think they are still available from Beru but they were intended to be used in high performance engines and had a variable heat range design.

They may be still marketed under the Nology brand.

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http://i19.photobucket.com/albums/b1...c/GOWIDE-1.jpg
1971 280SL ROADSTER
1988 300CE TWIN TURBO WIDEBODY
1994 E320 CABRIOLET
1999 C43 AMG
2005 G55K AMG
2008 CLK63 AMG BLACK SERIES