Thread: Alternator?
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Old 12-02-2018, 07:22 AM
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85 DSEL 85 DSEL is offline
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Join Date: Oct 2006
Location: Dayton, Ohio
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Hey guys, this started several weeks ago when I started my '95 E320 wagon: very brief squeal from the engine bay. It doesn't do it every time it is started, however, it is becoming more common an issue and is lasting a bit longer - we're talking maybe 2-3 seconds. As acceleration is increased so is the squeal, conversely, it stops when letting off the go-pedal.

Battery tested at 12.x volts not running. With engine running (nothing electrical engaged other than the auto climate control in AC mode) it shows 13.68v. Thinking I should be seeing something north of 14 - 14.5v...

Voltage regulator maybe? Testing procedure?

Thanks for helping diagnose

1995 W124 Wagon


1995 E320 Wagon 185K
1988 260e Sedan 135K
2007 F-150 XLT 188K
2003 Harley Davidson FLTRI Anniversary 26K
2006 BMW 330Ci 110K - SOLD
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