In Reply to: What Spark Plugs should I use for my 1989 535i??? posted by dpom on February 22, 2000 at 12:58:14:
Well im about to try the bosch plus 4's. I contacted the bosch tech folks and the guy i talked to said he highly reccomended the plus 4 plugs. He said they have had very few complaints about them and if you didnt like them they were 100pct refundable. dont know if that will work for you in germany tho...