Keep an eye on your voltage regulator

1976-1985: 230T, 230E, 230TE, 230CE, 280E, 280TE, 280CE, 240D, 300D, 300CD, 300TD,
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300TDT
M-100
Posts: 619
Joined: Thu 06 Dec, 2007 12:17 am
Model you own: w123
Location: Sydney

Keep an eye on your voltage regulator

Post by 300TDT » Thu 28 Sep, 2017 10:44 pm

Recently my red charge indicator lamp began staying on after starting, and progressively longer each start.
It usually went out with higher revs.
I suspected the voltage regulator but before I could check it, the battery died.
The battery was 4 1/2 years old so was at the end of its life anyway.
I was able to get a Beru voltage regulator from my neighbourhood parts shop straight away.
Problem solved, I thought, but the new battery wasn't charging...
Auto electrician replaced the bearings in my 55A Bosch alternator identifying the worn down brushes of the voltage regulator as the cause of the bearing damage.
Make sure you replace your regulator in time.
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'82 300TD Turbo : '83 model, LHD, auto, anthracite grey, cream cloth, chassis: 380,000km, engine: 195,000km.

230ew123
Adenauer
Posts: 325
Joined: Wed 19 Oct, 2016 11:34 pm
Model you own: w123
Location: eaglemont + cranbourne sth

Re: Keep an eye on your voltage regulator

Post by 230ew123 » Wed 22 Nov, 2017 5:31 pm

I read ya brother! It was one of the first things I did when I got my merc and glad I did

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