1993 300TE AC issue. My mechanic doesn't know. - Page 24 - Mercedes-Benz Forum
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post #231 of 245 (permalink) Old 08-02-2018, 12:45 PM
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On a related note, for the people who freak out at temps over ~100C on the dash gauge. I found some interesting temperature charts in the FSM, in the HVAC section (job 83-608, page 7).

Note the ENGINE COOLANT TEMPS which MB shows as acceptable for a given ambient temperature, with the AC running.

Example: Gas engine (124.0/.2), at 40C ambient temp (104F), shows a coolant temp of... 112C. Well past most people's freak-out point, but well below the red zone on the gauge (120C) and further below the compressor safety cutout (125-128C).

Also note that the chart pretty much shows the MINIMUM engine temp at 100C with the AC under load, and it starts moving above 100C around 27-28C (80-82F) ambients.

Interestingly, the diesel engine charts show two curves, one for low vs high humidity. The gas engine chart only shows one curve. Both diesel temp curves are generally lower than the gas engine. Shame they didn't show both curves for the gasses.
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post #232 of 245 (permalink) Old 08-02-2018, 01:12 PM
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Correct, both are OEM. But, Behr unit in MB packaging is Chinese made and that's why I returned it and opting for the German made Sachs unit.
Well, there's your dark card then; 'Made in China'. ALWAYS opt for German-made if you can. From what I've been told Lemforder suspension parts are now made in China as well....sad.....the BMW boy racers are gonna be pissed.

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post #233 of 245 (permalink) Old 08-02-2018, 02:35 PM
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Well, there's your dark card then; 'Made in China'. ALWAYS opt for German-made if you can. From what I've been told Lemforder suspension parts are now made in China as well....sad.....the BMW boy racers are gonna be pissed.

Kevin
Yup, had the Lemforder engine mounts installed and they failed in less than two years. They are Chinese made. Parts was replaced under warranty but was out $200 for the labor.
Probably will fail again in two years... and the cycle continues.
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post #234 of 245 (permalink) Old 08-02-2018, 04:53 PM
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Yup, had the Lemforder engine mounts installed and they failed in less than two years. They are Chinese made. Parts was replaced under warranty but was out $200 for the labor.
Probably will fail again in two years... and the cycle continues.
This is extremely important for those of us with W124s/W123s and to a lesser degree, the W210 or equivalent. Mercedes has intentionally changed direction on support for their cars older than 15 years. They no longer stock all consumable items the way they had in the past. This isn't an issue for cars made after 2005 because honestly they just aren't up to the same standard the earlier cars were up to. The cost of diagnostics and service on these rolling computers will dwarf the value side of the proposition.
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post #235 of 245 (permalink) Old 08-03-2018, 12:04 AM
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Those graphs speak volumes.

Proves that those who think coolant temps above 90C is overheating are still living in the flathead V8 era. Engines that run cold are not efficient.

On some modern day cars, like the current gen ND Miata and its twin Fiat 124, the temp gauge doesn't even start to register until 100C. And in the case of the Fiat, that is a car which uses a dinosaur tech engine (iron block, port injection, etc.).
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post #236 of 245 (permalink) Old 08-03-2018, 03:57 AM
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gsxr, you're such a buzz-kill, beating everyone over the head with such obvious facts.

Why do you do this?!?
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Nah, his last reply in the debate was directed at Casey, and I'll let Casey respond if he's so inclined.

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Originally Posted by gsxr View Post
On a related note, for the people who freak out at temps over ~100C on the dash gauge. I found some interesting temperature charts in the FSM, in the HVAC section (job 83-608, page 7).

Note the ENGINE COOLANT TEMPS which MB shows as acceptable for a given ambient temperature, with the AC running.

Example: Gas engine (124.0/.2), at 40C ambient temp (104F), shows a coolant temp of... 112C. Well past most people's freak-out point, but well below the red zone on the gauge (120C) and further below the compressor safety cutout (125-128C).

Also note that the chart pretty much shows the MINIMUM engine temp at 100C with the AC under load, and it starts moving above 100C around 27-28C (80-82F) ambients.

Interestingly, the diesel engine charts show two curves, one for low vs high humidity. The gas engine chart only shows one curve. Both diesel temp curves are generally lower than the gas engine. Shame they didn't show both curves for the gasses.
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post #237 of 245 (permalink) Old 08-04-2018, 08:11 AM
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From what I've been told Lemforder suspension parts are now made in China as well....sad.....the BMW boy racers are gonna be pissed.
Lemforder suspension parts are changing to different countries of manufacture, but not all China. They used to rebox OEM parts (Boge, Metzler, etc) if Lemforder were not the OEM; and most all of that stuff was made in Germany. In the last few years, this has changed. Lemforder 124 strut mounts are made in Brazil, 124 LCA bushings are made in Spain but smell like Harbor Freight rubber. 124 V8 drag links are made in Turkey (had been Germany, IIRC). The rear wheel carrier support joints are also still made in Germany.

The last 124 V8 tie rod assemblies I received earlier this year were still made in Germany, and W211 front inner+outer tie rods & upper ball joints were also all Germany. But the 211 lower ball joints, and strut/track rods, were made in Turkey. All the 211 OE parts are CFW, btw.

Bottom line, you won't know where the Lemforder part is made until you receive the package. I still think most of their stuff is good quality, the only item I've had reservations about were the odoriferous LCA bushings (still in the box, not installed).

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post #238 of 245 (permalink) Old 08-04-2018, 03:36 PM
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It's the metallurgy I'd be worried about under stress. I've had work tools made in Turkey and even though they were massive enough, they just fractured and broke.

This is Meyle's big brag...that their suspension parts are redesigned to be stronger than OE. And in real-world application, that hasn't proven to be true at all. Turkey was their manufacturer and the parts packed in "Made In Germany" boxes. But the parts said, "Made in Turkey".

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post #239 of 245 (permalink) Old 08-12-2018, 09:20 PM Thread Starter
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I just want to say thanks to everyone who helped me. I took all the advice, worked hard to clean, update, and replace parts....and now I am happy to say my car stays properly cooled. As shown in the photo...I can sit in stop-and-go traffic in ambient 95-100F temperatures and run at cool engine temps....again...thank you all....
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post #240 of 245 (permalink) Old 08-12-2018, 11:11 PM
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I just want to say thanks to everyone who helped me. I took all the advice, worked hard to clean, update, and replace parts....and now I am happy to say my car stays properly cooled. As shown in the photo...I can sit in stop-and-go traffic in ambient 95-100F temperatures and run at cool engine temps....again...thank you all....
Excellent, glad to see you're finally keeping the engine temp under 100c.

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