Originally Posted by prism

I just took my 2005 E53 3.0D with 74,000km for servicing and the official stealer told me that one of the spark plug (injector?) units had to be replaced and would cost me USD 600. He actually advised me to have all 6 replaced in anticipation of failure of the other 5. Is this for real? Is something like this normal after only 74,000km? Please advise I really feel desperate right now.

Thanks!