I asked this question on the Sl forum with only one response but would really appreciate more opinions.
My 89' 560SL is presently running a very rich mixture. I am trying to discover the cause. One 'Techie' input has been that my fuel injectors are the OEM 'iron type' and should be changed over to the modern brass ones. This sounds rather odd to me but obtaining the correct answer will establish whether this 'techie' is full of it and to be avoided
An thoughts on what might be the cause of this rich mixture would be greatly appreciated.

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