Just pulled the plugs on my 96 SL500 and they have washers? BERU brand (made in france) 14F-8DU4. They are not tappered.I think they are the wrong plugs,it just dont seem right. I just pulled them to do a compression test cause I'm comming up on 260K. Some nut overtorqued the right bank.I had to use a 1/2" drive breaker bar with a 4' long pipe on it
