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 W
hrottle 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.