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post #17 of (permalink) Old 05-03-2019, 03:17 PM Thread Starter
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Date registered: Feb 2015
Vehicle: 1995 SL320, 1995 SL500 ("Red Devil " project), 1998 C280, 2004 E500 4matic
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Originally Posted by oldjonesy View Post
what is the LH module and the WOT enriched unit ? I'm an SL500 newbie and learning as I go but very interested in slightly increasing the growl of the M119 without incurring long distance driving drone or performance so thanks for a very interesting thread.

This LH module is located under the hood, in the aluminum computer box (same area where you will find 38 pin diagnostic port, same place where the E-Gas module, and such, once the cover is opened, you will see all of them stacked in the row, basically the computer brain for these non-CIS pre-face lift cars)

Some curious minds figured out that that some early models of W140 fitted with M119 5.0L engines were equipped with LH modules that were a little different from the others, they had a Wide Open Throttle enrichment, basically "richens the mixture" at WOT... And when dyno tested, depending on the condition of M119 engine, once fitted into compatible non-W140 car, would provide additional horse power, certainly not a huge amount, but up to 10HP in some cases. Very popular mode with w124 E500E owners. Personally, I will take any known and proven upgrade/update for m119 I can get my hands on. And these are affordable.

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