How long do they typically last in the diesels? My 190E ate them for breakfast - I was constantly changing the volt reg pack/brushes after I learned how. First 2 times I got new alternators.

I've been driving this rig for almost 220,000 miles (currently 306K miles) and still the same alternator! I check while driving and the volts coming back are 13.1-13.5! I do have a squeal and wondered if it might be a failing alternator although my indie says the pulley is moving nicely and doesn't seem to be the issue -the squeal did occur after they washed my engine to look for a possible coolant leak - nothing found.

thanks
1996 E300

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1991 190E 311K [Brilliant Silver/Black MBTEx] -retired
1996 E300 315K [Black/Grey MBTex]

Want to put a tank in the trunk for WVO/SVO in the E300 Need to find a place to store my OIL!
Still procrastinating about the biodiesel/WVO
Made some biodiesel but so afraid to pour it all in - I've added some and think I'll supplement my fuel to see how I make out

Made some biodiesel but the process scares me - methanol fumes are not your friend! Need to do this outside.

The noise is probably a slipping belt.
With a diesel having such a large battery, the load on the alt is much more gentle & so maybe helps it to go longer.
At 600k to 700k miles the slip rings are generally gone down to the plastic.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

I've had to replace the alternator on all of our MB's at least once, except for my 300E. So far we've driven it about 21k with 0 issues from the electrical system.

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-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)

When they build a car they want they are hoping everything on the Car; including the Alternator is going to last past the Warranty.

The comment about the Battery is well placed. You need to have a Battery of the correct capacity or better.

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84 300D, 82 Volvo 244Gl Diesel