Hello friends. I have owned a 1995 SL600 for many years now and the cluster tach has always been off. My best guess is someone installed an SL500 cluster so tach reads low. At max RPM i only get to 3500 maybe. Wondering if someone had any info on these EEPROMs to change tach multiplier.

Other issue i need to fix is part number in LH control unit. Had to replace with one from W140. It works fine, but always have to connect as W140 in DAS to diagnose. Wish i could fix this. If i could just change what part number it though it was i would be set.
Appreciate any help!