Looks normal to me. Does anyone think these readings are wrong? Often alternators don't have much output at idle. In my limited experience 13.2 seems a little low but I have seen in other posts that these Mercedes regulators don't run at 14.4 like some of the others, if I understood correctly.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra