[W126 Coupe] Speedo update

[Axel Wulff]

Bruce,

 

The speedometers in our cars are electronic and the part itself is a
straight swap.

 

However, calibration is going to be an issue. I, and other members on this
list, have used a Dakota Digital SGI-5 to calibrate our speedometers after
swapping differentials, transmissions or wheels, but those were minor
adjustments compared to yours. At the most we would have to correct a 15 mph
difference. If I understand you correctly, you are trying to go from an 85
mph speedometer to a 160 mph speedometer. I'm not sure the Dakota device can
do that.

 

The first thing I would do would be to run you car with your old speedometer
and see what speed you are running at, for instance, 3,000 rpm. Then put the
new speedometer in and see what it shows at the same rpm. You could be in
luck and it would display correct speed, but at least you'd know how far off
it is.

 

Best of luck.

 

Cheers,

Axel

 

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of brucegorsak at netscape.net
Sent: Monday, January 16, 2006 7:24 PM
To: mbcoupes at mbcoupes.com
Subject: [W126 Coupe] Speedo update

 

My 82 380SEC has that rediculous 85 MPH speedometer. I have picked up a 160
MPH unit from an 85 500SEL and changed the miles to match that of my
380....Can I swap them out directly or no?  I'd just like to know what I'm
in for before I start taking it apart....things like calibration, or
ANYTHING, ... if someone can provide some insights....it would be
appreciated.

 

Thanks,

Bruce Gorsak

'64 190D, '72 280SE 4.5, '73 450SL, '75 300D,

'80 300TD, '82 500SE, '82 380SEC, '86 560SEL 

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