Hi, thanks for the input, but as I stated before, the main reason I want to replace the voltage regulator is because it is factory set for 14.1V which is as far as the system voltage will go. Problem is that this voltage is not hight enough to fully charge a Lead-Acid battery which requires a voltage of 14.4~14.5V to reach a full charge.

Older voltage regulators used to conservatively be set to a lower then optimum voltage (not sure why), and there are even some older Benzes that have regulators with a set point as low as 13.8V. Not good for the battery life as a chronic undercharged condition will promote sulfate formation on the cell plates and reduce battery life.

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W163 ML230 EURO SPEC 1999
W124 300E 1986