E55 speedo problem

Jun 17, 2014 | 03:39 PM

Tommy Kaira

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E55

E55 speedo problem

Hey all,

Wasn't sure which sub-forum to start this thread in.

I got a 2004 E55 a few weeks ago. Last weekend I took it on a road trip and found the digital speed readout. I noticed that the needle was reading different to the digital read out. I checked against my Garmin satnav which confirmed that the digital readout was correct and the analogue needle was reading slow...when the needle says 22mph the digital and satnav show 30mph, at 60mph on the the needle, digital and satnav say about 80mph.

Anyone got any ideas why the needle would be reading slow?

Many thanks,
T K

Last edited by Tommy Kaira; Jun 17, 2014 at 04:05 PM.

Jun 17, 2014 | 05:18 PM

HeissRod

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From: Cypress, TX

'06 E55, '15 Jeep SRT8, '94 Mustang GT

Stock size wheels & tires?

Jun 17, 2014 | 05:29 PM

Tommy Kaira

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E55

255 35 19 tyres (fitted when I got it so not sure what stock is). But I'd assume the digital and analogue readouts would take the measurement from the same place, or am I wrong?

Jun 17, 2014 | 06:11 PM

HeissRod

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From: Cypress, TX

'06 E55, '15 Jeep SRT8, '94 Mustang GT

It's a possiblity that they don't, but that would have to be a horribly sized tire for the difference of 20mph @ 60.

Is the 255/35 the rear tire?

Jun 17, 2014 | 06:25 PM

Enigma94

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C32, C55, 08 E63

Tire size would effect both digital and analog read outs not just the analog needle.

Jun 17, 2014 | 06:31 PM

HeissRod

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'06 E55, '15 Jeep SRT8, '94 Mustang GT

Quote:

Originally Posted by Enigma94

Tire size would effect both digital and analog read outs not just the analog needle.

Damn. You're right. Work has blitzed my brain today.

Jun 17, 2014 | 06:32 PM

Tommy Kaira

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E55

Enigma, That's what I thought.

HeissRod, that's the front and rear. They are CL65 rims I believe.

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Jun 17, 2014 | 07:29 PM

Tommy Kaira

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It looks that way. Thought I'd check here first in case anyone has already had the issue.

Jun 17, 2014 | 07:37 PM

#10

HeissRod

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'06 E55, '15 Jeep SRT8, '94 Mustang GT

Quote:

Originally Posted by Tommy Kaira

HeissRod, that's the front and rear. They are CL65 rims I believe.

Just an FYI, since you were unsure, the stock sizes are:
245/40_18 F
265/35_18 R

Jun 17, 2014 | 07:46 PM

#11

HeissRod

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From: Cypress, TX

'06 E55, '15 Jeep SRT8, '94 Mustang GT

Here is someone who had a similar problem, but with the digital and analog discrepancies reversed. (Analog reading higher)

https://mbworld.org/forums/w211-amg/...rong-here.html