Question about Mercedes-Benz E350
The analog is just reading random speeds. It doesn't go to zero when i stop and it went to 135 mph while I was driving the kids home from daycare. The digital appears to be working along with all other instruments.
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Posted on Jan 02, 2017
how is your shifting, usually a bad speed sensor will set a check engine light and may cause shift errors, this trans has a internal and external speed sensor, the pcm uses the external for shift and for cruise and for also cruise control. A quick no scanner way to tell is if your cruise is working, if it is then your most likey looking at a bad cluster, take it from me i'm a master gm tech. if i don't have a scanner to do a guage sweep it's like having a broken arm while fixing these. but this should help you out.
Posted on Jan 06, 2009
"The Fix" works...I would have not believed it untill I did it.... Start the car in reverse and about 5 times later it reset the speedometer back to zero.....wow!
Posted on Jun 27, 2009
There was a recent class action law suit settled with GM for this exact problem. You can google gm speedometer lawsuit and get lots of information. Unforutunately for most people I think the warranty was limited to 7 years and 70,000 miles. Which isn't a lot of miles for most people.
If you car isn't covered by the warranty there is a way to "reset" the speedometer.
You can turn the ignition slowly like you are going to start the engine. There is a very small "dead" space where you will see your guage lights go off.
What you want to do is cycle the ignition switch from off to that dead space. Each time you do it your stuck speedometer will move towards zero about 10 mph. So if its stuck on 40 you will have to cycle it at least 4 times.
At first you will probably actually hit the ignition and the engine will try to start.....just release it and try it again.
I know this because I have a 04 avalanche with 80,0000 miles and it has this problem about twice a month.
Posted on Jul 07, 2009
The rear wheel speed sensor is the most common problem on those trucks and will do what you are talking about. It is located at the top of the rear axle in the center. It picks up it's signal from a tone ring on the diff inside! If a tranny input or output sensor is bad then the tranny won't shift properly!
Posted on Aug 14, 2009
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