M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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V12 tach output

Old 07-22-2018, 11:30 PM
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2003 CL 600
V12 tach output

Looking to wire in a window switch, need RPM signal, has anybody wired in a tach output somewhere? I tried backprobing the OBD signal wire at the m/e and was getting an inconsistent signal (pin 12 connector 4). Hoping someone has more info to save me on trial and error time.

Thanks in advance
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