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Time for an update - @vijilants - sound advice, many thanks. 12 V+ to the solenoid connector from the ignition switch resulted in a spark (short circuit style). Checked and found continuity between the solenoid connector and earth, suggesting faulty soleniod (?). Connected a test lamp between...

I could need some input in troubleshooting why my MB doesn't start . . . Last year it was standing for a while whilst I was sorting out the clutch hydraulics, and when ready to roll there was an intermittent non-starting problem that has gradually got worse, to the extent is doesn't start at...

Now after nearly a year and around 1500 miles later, the judder I felt when engaging the clutch has gradually got less noticeable, so I hope I got the new slave cylinder fitted in time to avoid having to replace the friction disc. Otherwise, just before setting off when moving house, the...

Well, it took a while, but I hope that I've finally managed to get my clutch hydraulics fixed. Some mental notes I made underways; a) whilst the flare nuts on the brake master cylinder are 11 mm ones, the one on top of the clutch slave cylinder turned out to be a 12 mm one. Why standardise...

More great advice on part numbers and where to source from, many thanks. Also great tip on re-using the old piston rod if the one in the new one isn't of the same length. I've previously rebuilt ATE brake calipers & master cylinders on my bikes, so have a little experience with that. On the...

Ooops - guilty as charged :-( Anyhow, a couple of years ago I went over the brake system, and fitted new (rebuilt) rear calipers. They must have been of extremely poor quality if they've started leaking already, will look at that once I have a working clutch again. My relatively sudden loss...

Thanks once again for good advice. I finally managed to get the car up on a couple of ramps, so I could get a look at the slave cylinder. It certainly would have helped with double jointed fingers, with the downpipes conveniently restricting access . . . Anyhow, I could see a moist spot next...

Very good lateral thinking there! However the fluid level in the frontmost brake part of the reservoir has remained OK through all this; in fact it's the reason I was fooled into thinking that the fluid levels were OK, since I didn't know that the reservoir in fact doubles as two. Here is mine...

Great tip - we should consider us lucky lots of these cars found their way to Oz and not only Africa; thereby we get useful advice back! Manual clutch issue - OZBENZ The tip I read about bleeding the slave from the right brake caliper should have indicated to me that I should have looked for...

Thanks again, optimusprime for helpful advice. I've now got time to look a bit closer, and think I have an idea of where the master & slave cylinders are. In this picture: I take "1" is like the rubber hose feeding the master from through the torpedo wall, it looks dry, i.e. no evidence of a...

Thanks, SMS and optimusprime, for very helpful comments. When the brake warning light came on, I had a quick look under the bonnet and saw the brake fluid reservoir was near the max level, but wasn't aware at the time that the clutch hydraulics shared the same container. This morning I could see...

Hi all, first I'd like to say thanks to everyone here, whose brains I've been able to pick when it comes to troubleshooting a few minor issues with my '85 W123 estate. Within a fortnight, and in less than 30 miles local driving, my clutch pedal started to loose its "bite" gradually, until it...

Hi, I've gradually been going through the brakes of my S123 200T. About 10 years ago it had new brake disks & pads installed at a major service, but the calipers were left unattended - and now the caliper pistons have eventually started to seize. My focus is atm on the front calipers; Bendix...

Not sure about the relevance of this, but have you checked the integrity of your ignition system? My recent experience: http://www.mbclub.co.uk/forums/engine/218625-starting-troubleshooting-175cdt-carb-fueled-w123.html

Yes, agree to all the above. Except that it is difficult to fit a new original complete HT lead, since it is routed under the cyl head cover on the W123 102 engine. Interesting. That's obviously why I found out that one of my spark plug insulators was broken, leaving the top end of the spark...

SORTED: Starting troubleshooting, 175CDT carb fueled W123 Steve, many thanks for this advice. Others who have read this thread should please note that what Steve said is GOSPEL when it comes to trouble-shooting the problems I described! Yes, I had checked the carb diaphragm a couple of...

Thanks again. In the chapter on engine electrics in the latter I found this: "An interference suppression resistor of 1 kOhm is installed in the spark plug connectors. These can be unscrewed (M3 thread)." I understood this to mean that the plug caps (and not the resistors) can be unscrewed...

Yes, I've been using that trick for my MCs. But first I need to get the car engine to run :-) No, my W123 was built in autumn 1985 - so it came with the electronic ignition module version. I think the capacitor only was used with the contact breaker ignition systems? I measured the resistance...

Many thanks for this link! Very useful data.

Thanks for further great advice. I actually had a look under the distributor cover, but couldn't see any signs of moisture. After getting the car towed home, I've had better opportunity to check some functions (fuel pump, quality of fuel, sparks to plugs by means of inductive pick-up timing...