New member looking at a '69 250 - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 09-09-2008, 02:33 PM Thread Starter
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New member looking at a '69 250

Hey all - I'm a former Porsche and BMW mechanic with a racing and fabricating background. I'm new to the whole MB scene, though I've owned three Porsches (still own one, the "baby") and five BMWs, all of which I serviced.

I'm curious of the reliability of these models, and would love to hear some feedback on daily-driver potential for a ~150k mi. chassis with a motor rebuilt two or two and a half years ago. The car appears to be an 8.5/10 or so overall, having been restored at the same time as the motor rebuild. It's quite clean!!

The owner is asking $4000 for this 4-door 250, and my girlfriend is very taken by it, as they say. I'm considering undertaking responsibility as its caregiver (PC for "mechanic" ) if I hear good things about its reliability.

Either way, thanks for the input, and thanks for having me!
Kevin Reagan
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post #2 of 3 (permalink) Old 09-09-2008, 03:29 PM
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I owned a '70...

250/8 for about 20 years. I put close to 200K on the car. The carbs will require attention from time to time. Basic tune-up/valve adjustment is every 12K.

Make sure all the electrical grounds are in good shape, as with a copper radiator, aluminum alloy head and iron block, you can end up with electrolysis, a/k/a "metal termiting" of the cylinder head if the engine is not well grounded. Something you will not have had to be concerned with on a Porsche... don't know if this was an issue with BMWs.

1968-69 cars have a "smog pump" which to my mind makes then less desirable than the later 250s that utilized the dual diaphragm distributor as an emission control device. The original air pumps had fiber-composite vanes, which when they fail, will fill the air injection system full of fibrous crud... not fun to clean out.

All in all, if your mechanically inclined, they are straight forward cars, and very enjoyable to drive and own. Please also note, with a heavy chassis and realatively small engine, the fuel economy is nothing to write home about...

If well maintaned, the cars can last a long time.
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post #3 of 3 (permalink) Old 09-10-2008, 12:06 PM Thread Starter
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Originally Posted by E-Class Owner View Post
250/8 for about 20 years. I put close to 200K on the car. The carbs will require attention from time to time. Basic tune-up/valve adjustment is every 12K.

Make sure all the electrical grounds are in good shape, as with a copper radiator, aluminum alloy head and iron block, you can end up with electrolysis, a/k/a "metal termiting" of the cylinder head if the engine is not well grounded. Something you will not have had to be concerned with on a Porsche... don't know if this was an issue with BMWs.

1968-69 cars have a "smog pump" which to my mind makes then less desirable than the later 250s that utilized the dual diaphragm distributor as an emission control device. The original air pumps had fiber-composite vanes, which when they fail, will fill the air injection system full of fibrous crud... not fun to clean out.

All in all, if your mechanically inclined, they are straight forward cars, and very enjoyable to drive and own. Please also note, with a heavy chassis and realatively small engine, the fuel economy is nothing to write home about...

If well maintaned, the cars can last a long time.

Thanks for the input! Sounds like there won't be any curve balls - sounds much like old BMW concerns and procedures - especially with the goofy 60's and 70's emissions control devices!
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