1985 300SD.

The issue:
At night with the headlights on; there was a distinct/annoying brightness fluctuation that went faster/slower with engine RPM.

I pulled the alternator to replace the voltage regulator.

SURPRISE:
I found the noise suppression condenser melted, drooling it's plastic coating into the alternator..
Drooled plastic interfered with the tin finger that contacts the regulator..

The repair:
* Removed melted plastic.
* Replaced the noise suppression condenser.
* Replaced the voltage regulator.

The issue is gone..

you get some strange ones...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Haven't heard this one before - definitely something to store in the noggin should it happen...As usual thank you for sharing!

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

That is for sure. Though among my fleet I've seen some weird stuff happen too.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)