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Old 05-29-2002, 08:44 PM
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Any Major Problems with 300Ds?

Are there any common problems that are big ticket? (anything over 200 dollars?) Are the turbos in these long lasting, or do they commonly break. Also heard how awesome these engines were on If treated right, how long should these engines last?

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Old 05-29-2002, 08:56 PM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,781
It all depends on oil changes and how well it has been taken care of. 500k miles on the bottom end and 250k miles valve guides and seals. Timing chain/guides around 150-200k. The trannies will go a long time too with regular fluid/filter changes.
You will need to replace suspension parts once it gets over 150k miles - tie rod ends, ball joints, etc...
I just replaced the valve guides/seals on mine at 230k miles and I am sure it would have gone longer, it was not using any oil but the cooling system was remaining pressurized over night (a sign of a weak cylinder head gasket in my opinion but there are different thoughts on this).
These engines are worn out when you can't keep oil in them because it is going out the tailpipe but they will keep running. You are just putting the "fuel" in the crankcase instead of the fuel tank. One thing I have noticed about Mercedes is that they will give you plenty of warning before they leave you by the road.
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Old 05-29-2002, 10:57 PM
unkl300d's Avatar
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Join Date: Jul 1999
Location: San Francisco, Ca
Posts: 2,324
search and you will find

Kyle, welcome to this site.
Do a search for your anwer.
Tha archives are full with pointers on this very subject.
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
1979 240D 140Kmiles (bought for parents) *SOLD.
1989 300SE 148 K miles *SOLD
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Old 05-29-2002, 11:33 PM
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Turbo drain seals. Royal pain in the a** to change. $2.00 part, dealer wants $700+ indy wants $500+. Do it yourself for 6 hours of labor and some tips from this forum.
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Old 05-30-2002, 04:53 AM
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Yes there is something wrong with all of them.

It will last alot longer than you will want to drive it.
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Old 05-30-2002, 04:05 PM
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I dont think I will ever get tired of it

I love the classic styling of the W123 chassis. The reliability, ease of repair, and safety all seem like a good combination for a first car for my son. I am willing to pay up to 3k for a good one, but will prolly get one from dealer friend up the road for 2500. Thanks for your input. BTW, what do you mean turbodiesel when you say there is something wrong with all of them?
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Old 05-30-2002, 04:12 PM
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It was just a joke, that there is something wrong with them referring to you getting tired of driving them.
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Old 05-30-2002, 07:13 PM
gsxr's Avatar
Join Date: Aug 2001
Location: USA
Posts: 8,033
PLEASE specify if you are referring to early 300D (W123 chassis, 1977-1985) or the later model 300D (W124 chassis, 1987-1995)! They are TOTALLY different cars with TOTALLY different "problems", and they're both "300D".

But for either, the turbocharger itself normally lasts forever. The engines if cared for properly are usually good for 300-500kmi. The later OM60x engines are more fragile due to the aluminum head, but will last just as long IF they are maintained properly (particularly the cooling system).

Dave M.
Boise, ID

1997 E420 - 155kmi (Bugeyes)
1994 E420 - 145kmi (Blondie)
1993 500E - 193kmi (Lollipop)
1992 400E - 189kmi (Stinky Dirty)
Check out my website photos, documents, and movies!
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Old 05-30-2002, 08:18 PM
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If I listed all my benzes in my sig I think it would take up 1/4 of the page I got my first diesel, an 83 300D in June of 2000 with 179,000 miles. I still miss it, buy "car54" here has it now and I get to hear all about it often

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