1984 mercedes 280sel - w126 - 5 speed - PeachParts Mercedes-Benz Forum

t walgamuth · #1 03-25-2009, 06:06 AM

Quote:

Originally Posted by Mark DiSilvestro

I don't doubt the originality of my 5-speed, just my speedometer. And I'm not claiming my current speedometer indicates a three-speed auto, just that it has three hash-marks.
As you said, that would indicate a 4-speed (auto or manual) My automatic 240D speedometer also has three hash-marks. In any case, I could live with incorrect hash-marks, but someone's lame attempt to federalize my wagon has created a major speedometer error - caused by the different rear end ratios used in turbo and non-turbo 300TDs.
I believe my original non-turbo speedometer (probably in Km) for the 3.46 rear in my wagon, was replaced with a US mph unit, calibtated for the turbo 3.07 rear-end.

Happy Motoring, Mark

That should create a 13% error more or less.

I believe I have a 346 correct speedo if you need one, from a stick (the speedos seem to vary slightly to allow for slip in the automatic equipped cars). I'll test it for slip if you are interested.

Mark DiSilvestro · #2 03-25-2009, 08:50 AM

Quote:

Originally Posted by t walgamuth

That should create a 13% error more or less.

I believe I have a 346 correct speedo if you need one, from a stick (the speedos seem to vary slightly to allow for slip in the automatic equipped cars). I'll test it for slip if you are interested.

Automatic slip shouldn't affect the speedometer reading. Between the tranny output shaft (where the speedo cable connects) and rear-end, there should be no slip.

Happy Motoring, Mark

mgburg · #3 03-25-2009, 08:37 PM

Just put a GPS unit on the dash and go for a dash...MN allows 70MPH on their highways (at least on the Interstates) so you should be able to get a good read on the speedo...BTW, mine (280E Auto) varies by about 2-3% LOW...so I WATCH IT!!!

Sorry, didn't mean to stir up the pot here...I just noticed the 3 hash-marks on the speedo shot on the eBay set of pics and not the 4-hash that you would expect for a 5-spd tranny...

MERC Master · #4 03-26-2009, 05:59 AM

I just got the 280SEL on the road yesterday OMG it drives like a dream. I

insured it for $30,000. Stated cash value

not bad for $3850.00 paid and

is still the only one documented to exist maybee this one end up in

Stutgart some day

.

Question for all members who do you all use for insurance????? I have

found a

great insurance carrier for every day use with stated cash value unlimited

mileage

,Paul they are also one of the top rated companies as well.

brucem105 · #5 03-26-2009, 08:52 AM

I have a 280SEL 5-speed Euro, brought over from Europe, owned by AMG Denver where they gave it the full AMG treatment (white-out bodykit, wheels, suspension, Recaro C's, etc).

It's down in Atlanta at Jonathan's, hoping ot get it back on the road in 3 months or so. Fully documented all the way back to new.

Bruce

The Swede · #6 03-26-2009, 06:20 PM

Now that one sounds nice!

t walgamuth · #7 03-26-2009, 08:13 PM

Quote:

Originally Posted by Mark DiSilvestro

Automatic slip shouldn't affect the speedometer reading. Between the tranny output shaft (where the speedo cable connects) and rear-end, there should be no slip.

Happy Motoring, Mark

the slip is not there, its between the engine and the tranny so at a given output shaft rpm the engine is turning faster so thus a lower max speed in gears.

Leave it to the germans to build two different speedos in such a case.

Mark DiSilvestro · #8 03-26-2009, 11:44 PM

Quote:

Originally Posted by t walgamuth

That should create a 13% error more or less.

I believe I have a 346 correct speedo if you need one, from a stick (the speedos seem to vary slightly to allow for slip in the automatic equipped cars). I'll test it for slip if you are interested.

I assumed you were referring to variation in the actuall speedometer reading, not the position of the hash-marks.

If it was the speedometer reading, I was trying to say that regardless of whether it's a manual or automatic, where the speedometer is connected, there's no slip in the drivetrain that requires any speedomster allowance or variation.

Assuming an automatic (or clutch) was slipping like crazy, allowing the engine to scream at 5000 rpm to push the car at '65 mph, (almost like what my automatic 240D sounds like on the freeway) the speedometer should still accurately register 65 mph.

Happy Motoring, Mark

t walgamuth · #9 03-27-2009, 06:37 AM

Quote:

Originally Posted by Mark DiSilvestro

I assumed you were referring to variation in the actuall speedometer reading, not the position of the hash-marks.

If it was the speedometer reading, I was trying to say that regardless of whether it's a manual or automatic, where the speedometer is connected, there's no slip in the drivetrain that requires any speedomster allowance or variation.

Assuming an automatic (or clutch) was slipping like crazy, allowing the engine to scream at 5000 rpm to push the car at '65 mph, (almost like what my automatic 240D sounds like on the freeway) the speedometer should still accurately register 65 mph.

Happy Motoring, Mark

Ahhhhh. I was wondering. I thought you would have known this fact correctly. my mistake.

We are in agreement.