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Old 11-25-2014, 03:39 PM
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Join Date: Oct 2014
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Feasibility of successfully replacing starter 1976 240d

Hello! My starter on my 1976 240d is going out. I've decided to buy a whole new unit and put it in myself. Looks a little hard to get to though with it being right up against the block, but from what I've read, it can be done with a 10mm Allen wrench. Tips/recommendations are greatly appreciated! Thanks in advance!
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Old 11-25-2014, 04:39 PM
Diesel911's Avatar
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Location: Long Beach,CA
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Should be info in the:DIY Links by Parts Category - PeachParts Mercedes ShopForum

Most People do it with an Allen Socket and a bunch of 1/2" Extensions connected together with a Breaker Bar on the end.
The sockets in the Allen Head Bolts need to be clean of anthing that prevents the Allen Head Socket from going all the way into the hole. The tip of the Allen Head Wrench needs to be flat or barley rounded so all of the Hex Part of the tip fits into the hole to get the maximun surface of the Hex into the hole/socket of the Allen Head Bolt.

Cleaning the holes/socket ends of the Allen Head Bolts is the same for all of the Allen Head Bolts on the Mercedes and having a flat end Hex Bit on the Allen Head Wreanch is also the best idea so that all of the Hex surface gets inside of the Allen Head Bolt to decrease the chance of stripping the Bolt Head.
84 300D, 82 Volvo 244Gl Diesel
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Old 11-25-2014, 05:06 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,277
On my 1980 I took it out from the top....
I think I had to take out the battery and disconnect some wires..
but then I turned it up straight and pulled it out .....
it was so much nicer than dealing with a car with a turbo in the way....
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Old 11-25-2014, 06:13 PM
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Join Date: Sep 2012
Location: Wilmington, NC by the Atlantic ocean
Posts: 2,383
Sounds like you're a rookie at this so I'll state Step #1.......


Otherwise you'll find yourself learning arc welding as well as starter replacement. You WILL get high-amperage sparks going to places you didn't know were there.

The rest of it is pretty straightforward. Pull the wiring off the starter, pull the attaching bolts, and slide the starter out, either from the top or bottom. I find it easier from underneath but I have a hoist.

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Old 11-25-2014, 06:49 PM
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Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,032
One of my most useful tools in the shop is a 3' long 3/8" extension. I drop the back of the transmission and go in over the top side of the transmission with it. Use this same method to remove the fasteners holding the transmission on too.
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Old 11-25-2014, 08:13 PM
toomany MBZ's Avatar
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Location: central Va
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Should be straight forward, from the top of the engine, as mentioned, basic safety is always employed, but you know that.

Even tho after replacing a few starters, I haven't bothered to disconnect the battery...
83 SD

84 CD
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Old 11-25-2014, 10:01 PM
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Join Date: Dec 2009
Location: Shelbyville, Tn
Posts: 1,907
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."
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