One piece of info you may be interested in, and I'm not sure if it'll help but here goes-if you pull the LH module out of your CAN for a minute or so, then re-insert it, that resets the injection system and gives you the lowest fuel:air ratio-the computer then begins to lean itself out until the optimum mixture is achieved.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo