/r/w123

Photograph via //r/w123

The home of the Mercedes-Benz W123 on Reddit. Share photos of sightings, stories of car trouble, repair tips, media, issues and everything related to the beloved W123!

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The home of the Mercedes-Benz W123 on Reddit. Share photos of sightings, stories of car trouble, repair tips, media, issues and everything related to the beloved W123!


🟀 Rules 🟀

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All posts require an appropriate flair. Posts without a flair or misleading flair will be removed.

Repeatedly creating posts without a flair or misleading flair may result in a ban.

3.) Off-Topic Posts

All posts have to be directly related to the Mercedes-Benz W123. Unrelated posts will be removed.

Not following this rule may lead to a ban since off-topic posts fall under spam.

4.) Reposts / Spam

Make sure that you check the subreddit for duplicates before you make a post about something. You can do this by simply looking in the "New" section before you post or searching for keywords in the search bar of Reddit.

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🟀 Part Sites 🟀

FCP Euro

RockAuto

ECS Tuning

AutohausAZ

PelicanParts

MB Direct Parts

MercedesSource

MBZ Parts

eBay

More Sites...


🟀 Repair Sites & Forums 🟀

iFixit Repair/Disassembly Guides

Factory Service Manual (Mega.nz)

Factory Service Manual (Google Drive)

DieselGiant Maintenance Tips

PelicanParts Technical Articles

VIN Decoder/Descriptions

Paint Color Codes

Interior Color Codes

BenzWorld Forums

PeachParts Forums


🟀 Search by Flair 🟀

Media

Spotted

Discussion

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Question

Guide

Info

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🟀 Other Subreddits/Links of Interest 🟀

/r/w123

4,672 Subscribers

1

Wichita

Can anyone personally recommend a shop in Wichita to do a pre-purchase inspection?

0 Comments
2024/11/02
19:32 UTC

2

M102.920 idles rough when cold

I recently did an oil change on my 1984 200 and the things idles like a diesel when cold, but normally when warm.

I put 5W-30 in (unsure of what was in it before) and the engine is really struggling to idle when cold, but runs smooth when driven or warm.

It made a 15km drive back home fine as well, but I'm still a little concerned, does anyone know what's happening?

0 Comments
2024/11/02
16:03 UTC

5

M102.920 idles rough when cold

I recently did an oil change on my 1984 200 and the things idles like a diesel when cold, but normally when warm.

I put 5W-30 in (unsure of what was in it before) and the engine is really struggling to idle when cold, but runs smooth when driven or warm.

It made a 15km drive back home fine as well, but I'm still a little concerned, does anyone know what's happening?

20 Comments
2024/11/02
16:02 UTC

2

I read somewhere on here awhile ago that all North American W123s came with block heaters? Is that true?

13 Comments
2024/11/02
13:57 UTC

4

Which one of these is positive and which one is negative for rear speakers on my 85 300td?

11 Comments
2024/11/02
00:58 UTC

1

Twofold brake lines question…

Hello. This weekend I will be replacing the brake lines on my 82 300td. I’ve run into kind of a snag with the front passenger side line, cause of how it’s bent and tucked behind the firewall. It seems impossible to get it out of there (and subsequently install the new one). Is it possible to snake that line out of there somehow without removing anything but the battery tray?

My other question is about flaring. I noticed all the lines are bubble flared. I have the tools to do double flaring, not bubble flaring. Is that an issue? Thanks.

1 Comment
2024/11/01
00:55 UTC

2

In need of a steering wheel

Hello everyone!

I have recently purchased a decent 1984 300d and it's been a bit of a project so far, I've brought the engine back to life and did a few other minor bits and wanna drive it around to figure out what else it needs.

BUT my steering wheel is so bad, it's got rubber missing down to the metal cores and twists around it.

If anyone is willing to sell me an OE steering wheel that's in decent shape I'd be very grateful!

I live in Greenville, South Carolina and would like to pick it up in person.

Thank you!

6 Comments
2024/10/31
21:40 UTC

3

82 300D doesn't shift into 4th

Hi, I'm the new owner of my 1982 turbo diesel, and I have been loving the car so far, up until I just realized that the car might not be shifting into 4th.

The car shifts smoothly and without issue. Only noticeable quirk is shifting into second from stopped, the car will bump a little bit (sometimes, it happens intermittently.) but every other shift is in-time and smooth.

The problem is I'm not sure if it even attempts to grab 4th. From a stop on a highway pull, I can count how many shifts it does. It only shifts up to third gear, and stays there. Zero attempt to grab 4th. The engine doesnt seem too under load when at highway speeds, (most ive done recently since noticing this problem was 60-65, but before I noticed this, ive gotten it up to 80.) and the engine still has some power to give when I step on it. I dont want to over rev the engine if its not in its final gear, so i'm not sure if its a vacuum problem, or what.

Otherwise, the car is in pretty good shape. Only other problem I noticed is a light smoke coming from the exhaust when the engine is under load. I tried to recreate it by revving the engine in my driveway, which resulted in no smoke.

If anyone can help me figure out this transmission issue, that would be greatly appreciated.

13 Comments
2024/10/31
21:38 UTC

6

Bolt on turbo fir om617 NA

I know it's said by some people it's not doable. But who has turbocharged their NA 300D with good lasting effect?.I am planning on getting the turbo kits from dpuk for the 617 NA

8 Comments
2024/10/31
20:48 UTC

64

OM617.912 First Drive in 21 Years!

Anyone think the acceleration sounds a bit weird? It has no muffler but besides that. I feel like it might be misfiring. Let me know what you think!

11 Comments
2024/10/31
16:21 UTC

3

230CE Idle valve conected to valve cover breather?

https://preview.redd.it/7y6x847o5zxd1.jpg?width=1600&format=pjpg&auto=webp&s=6c6f5d81c2f65c6f68469a036f8d9550a0ed4103

https://preview.redd.it/0b4yd57o5zxd1.jpg?width=1600&format=pjpg&auto=webp&s=3176f8473ea0c15bb40248e3d4ef176b8f595d5a

Hi, I hope anyone have done this before and need some help. I'm trying to install an oil catch can but idk if i can bridge the hose that conect the idle valve to the valve cover breather? beacuse the car works just fine if i do but I'm wondering why the original design need that hose? There is some kind of PCV inside that idle valve?
Any help would be apreciate.
M102 engine, 230CE 82
Sorry for my bad english, posting from Perú :)

0 Comments
2024/10/30
23:09 UTC

1

Replacement Seatbelts - anyone have recs?

My passenger side rear seatbelt was missing when I purchased my 300td wagon, anyone found suitable replacements? Are they all the same regardless of which seat? I could probably get a decent one out of the junkyard if need to.

Appreciate any recommendations

2 Comments
2024/10/30
18:58 UTC

3

Lerms Instagram

Just FYI, I'm not sure if anyone has contact with him still. Lerm's Instagram account was hacked or stolen. Lots of posts from a crypto scammer.

5 Comments
2024/10/30
17:55 UTC

84

Bossman’s 124 body and my 123

Might end up copping a w124 soon..

13 Comments
2024/10/29
21:11 UTC

3

Which tools do I need if I want to own a 300D as a non-mechanic?

I love how these cars look and want to get my foot into the world of classic cars, but I am unsure where to begin. Is there a basic tool box/kit I could buy for every day maintenance? Thanks.

21 Comments
2024/10/29
05:10 UTC

5

Dying turbo

Well, as the title says....I believe my turbo is starting to go. It's starting to make a slight grinding noise. I'll be digging into it this weekend to triple check to be sure. But my main question is, What is a suitable stock replacement for it. I'm not looking to add power...just want a replacement cheap turbo and I'm not finding any online. Any cross references or semi drop in replacements?

9 Comments
2024/10/28
15:20 UTC

16

Anybody had any experience with this company/these seat kits?

Assuming it’s just reup

5 Comments
2024/10/28
15:10 UTC

1

Wiring diagram

Hi guys does anybody have wiring diagrams for a 82 240d specifically for the starter, lights, ignition, interior lighting

3 Comments
2024/10/28
02:21 UTC

5

How should the brakes feel

After I flushed the system using less than a liter I keep finding that the brakes are lighter than before but while I was in traffic I slowly pressed the brakes I reached the end of the padel and the car started rolling very slowly then I let my foot of the brakes and pressed it quickly and it worked like it was before the issue kept repeating for the whole drive

12 Comments
2024/10/27
09:59 UTC

38

Just bought a W123 what am I looking at to fix for it to at least be street legal

16 Comments
2024/10/27
01:05 UTC

3

Heirloom W123

Hi, I will preface by saying I have little to no mechanic knowledge aside from basic oil and tire maintenance but I always loved the look of the w123 platform.

I now have the opportunity to take ownership of a w123 TD coupe automatic almost for free.

The car has not been driven in roughly 5 years. Prior to that the car was stored during winter. I also have access to a garage for winter.

Based on YT and reddit, I'm forecasting 2.5 to 5k CAD minimum to get it running proper.

What does the community reckon? Is this a good summer-only car for the uninitiated? Would this be a money pit? What yearly maintenance costs would I be looking at?

Thanks!

12 Comments
2024/10/26
22:11 UTC

3

Time for expert help

Well folks, you hate to see it.

I removed every bit of wire from my car, tested everything, re-wrapped it all in new tape and insulation. Now it’s all back in. Most stuff like head lights are still disconnected, but I’m hoping to test the starter, and maybe even get the car running momentarily to make sure I didn’t ruin anything.

When I connect the batter to the negative, the glow plug relay makes a whining sound, the battery light and the right turn signal light stay on for some reason, the glow plug light does not come on when the key is on the glow plug position, and turning the key all the way in the ignition seemingly does nothing. I’m feeling like this whole project was a mistake at this point.

Anyways I’m out of ideas and I am looking for expert help. Most likely a mobile mechanic but I suppose I could get it towed to an electrical specialist. Anyone know who the best people in Southern California might be?

3 Comments
2024/10/26
21:07 UTC

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