M-Class (W166) Produced 2012-2015

Speedo error..

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Old May 30, 2014 | 12:10 AM
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Speedo error..

I have a few ios apps that give me GPS generated speeds and notice my speedo reads higher...at 120 kph it's 4-5 kph out..stock tires and wheels...anyone else have results ?
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Old May 30, 2014 | 12:56 AM
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I have a speed readout via GPS on my Escort Passport max that matches my speedo exactly.

BTW, I finally ordered the VBox sport and it should be here next week. I'll see how that compares to the speedo when I get a chance.
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Old May 30, 2014 | 01:04 AM
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Originally Posted by another_geek
I have a speed readout via GPS on my Escort Passport max that matches my speedo exactly.

BTW, I finally ordered the VBox sport and it should be here next week. I'll see how that compares to the speedo when I get a chance.
FYI if you're running iOS 7.1.1 the v box won't connect...you need an older fw or iPad etc

I'll switch to mph on the ml and see if that makes a diff,,,shoot me your vbox results !!
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Old May 30, 2014 | 01:06 AM
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You got the new Kitty ? Awesome...my fav!!...pics when you get it !
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Old May 30, 2014 | 01:14 AM
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Yes, I ordered an F-type R that should be here in July. Looking forward to it, which is why I ordered the Vbox. :-)

On racelogic's website, there's a note dated 5/17 saying that the iOS app has been updated to support iOS 7.1.1
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Old May 30, 2014 | 01:16 AM
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Oh good to know ...finally they got it figured out....
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Old May 30, 2014 | 01:24 AM
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Nope you read that wrong..no fix for f/w..just for performance app not good for us unless I didn't find the correct site...links pls...
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Old May 30, 2014 | 01:34 AM
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http://www.racelogic.co.uk/usastore/...ers/VBOX-Sport

only laptimer app has been updated. performancetest update coming soon.
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Old May 30, 2014 | 01:38 AM
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Just the lap timer app works but not iOS running 7.1.1 at least that's how I read it...no f/w upgrade to dl either
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Old May 30, 2014 | 08:43 AM
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Checked my speedo against my Garmin GPS and the readout was exactly the same. Probably the first vehicle I've had that was dead on. Most cars I've had were 2-3 mph off, usually low.
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Old Jun 4, 2014 | 07:17 PM
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Finally had a few moments to play with my new VBox. Speedo matches Vbox spot on.
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Old Jun 4, 2014 | 09:45 PM
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Must be in the mph to kph conversion..(for me)

How did you mate to your phone.. ? iphone ? less than 7.1 ? curious..what 0-60 ?
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Old Jun 4, 2014 | 10:06 PM
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I initially tried my iPhone 5 and while it connected to the Vbox, it wouldn't send any data. I pulled an old iPhone 3GS out of my junk drawer and am using that for now until they figure out how to support iOS 7.1.1

I haven't had a chance to do any good 0-60 or 1/4 mile runs yet... too much traffic and too many cops around my house plus I live in the hills so not a lot of straight, flat areas. Hopefully this weekend I'll have time to drive somewhere more isolated so I can do some runs. I was planning on getting a Weistec tune in a couple weeks while I'm on vacation so I wanted to get some before/after runs in.
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Old Jun 4, 2014 | 10:10 PM
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Keep us posted..If you're at sea level I'd predict 4.7 pretune and 4.3 post tune
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Old Jun 4, 2014 | 10:24 PM
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what are you seeing with the Renntech tune? Keep in mind I don't have the performance package like you do, so stock may be a little slower for me.
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Old Jun 4, 2014 | 10:30 PM
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After tune at 2500 ft..winter tires (19")..and a quite cold day..

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Old Jun 19, 2014 | 01:02 AM
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Looks like you were spot on with your prediction for post-tune times. I'm having difficulty getting a good launch from start, so I think I can do even better than this with some practice.

The guys at Weistec were great to work with and they even re-programmed the Eco button for me so that it remembers it's last state when you start the car i.e. it doesn't always default back to Eco mode on every time you start :-)
Attached Thumbnails Speedo error..-img_0054.jpg  
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Old Jun 19, 2014 | 01:09 AM
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Now that's smokin..now I gotta chase down that re-programming of the eco..how'd they do that ?
Why are you having start/launch issues ?
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Old Jun 19, 2014 | 01:16 AM
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Now change the puffers ..add downpipes and look for high 3's...crazy fast for a 5k lb tank
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Old Jun 19, 2014 | 01:17 AM
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The Eco button disable is built-in to the Weistec tune. It's a new feature that they can add to the tune if you ask for it.

I'm trying to left-foot brake the launch (rev to around 2000-3000 rpm) but the car doesn't seem to like that. The run above is from just mashing the throttle from a dead stop.
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Old Jun 19, 2014 | 01:18 AM
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I did change the filters at the same time. Not sure I'll do the downpipes or a turbo upgrade. I'm not out to build the fastest ML, just looking for more fun than stock :-)
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Old Jun 19, 2014 | 01:19 AM
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Yup I found the same..you can't load boost...best is as you did..full throttle and let it shift
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Old Jun 19, 2014 | 01:20 AM
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Originally Posted by another_geek
I did change the filters at the same time. Not sure I'll do the downpipes or a turbo upgrade. I'm not out to build the fastest ML, just looking for more fun than stock :-)
Yes ..my sentiments..any more power and she may need drive train hardware upgrades..
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Old Jun 19, 2014 | 01:27 AM
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Did you see 11's ?
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Old Jun 19, 2014 | 01:40 AM
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I didn't do any 1/4 mile runs. Just some 0-60 runs.
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