Review on 🔥 Bosch Automotive Copper Nickel Spark Plug (F8DC4) by David Crawford

These are the best spark plugs for Mercedes M119 engines. I've been using them for years and on the m119 platform the engine will misfire if you use a different spark plug. I recently thought I should try the new "reworked" spark plugs and the car was having trouble stalling when stopped (98s500) so I tried the reworked plugs on a '97 s500. The same thing happened and finally I tried it on my 99 s500 and exactly the same problem came up again. Then I thought I'd try that on a 94 400e and had exactly the same problem. I personally change the spark plugs and oil once a year (I typically drive 3000-5000 miles a year). I mean these are the cheapest spark plugs for this engine and they work the best. Be sure to check the gap and tighten properly. Do not use anti-seize on these plugs, it is not required.