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I have 2002 Benz s430 Have two problem 1. Car odometer

Customer Question
I have 2002 Benz s430 Have...
I have 2002 Benz s430
Have two problem
1. Car odometer exactly around 110000miles. On
Suddenly jump to show over 550000 miles show
I Try disconnect battery with reset system
Still show high mile
2nd problem is
Sometime EIS (electric ignition switch) key not turn over
Usually WHen I open the trunk ,
Key will not tun over
Have to wait few minute after normal
I try after engine start with trunk open?
ABS ,BAS,battery light came on
Even key will not turn off.
Have to close trunk then wait few minute
After system Normal
I scanned computer
Trouble. Code show EIS relate code came out
Submitted: 2 years ago.Category: Mercedes
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Answered in 1 day by:
8/24/2015
Mercedes Mechanic: Pete, Mercedes Mechanic replied 2 years ago
Pete
Pete, Mercedes Mechanic
Category: Mercedes
Satisfied Customers: 29,599
Experience: Over 15 years experience as a Mercedes dealer technician
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My name is ***** ***** I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
You may have two issues here or one related to all of the faults here.This sounds like a possible fault with the EIS itself needing replaced causing the starting and key hanging up issue.I have seen quite a few of these fail in the past before needing replaced to correct this fault.
The other issue may be the instrument cluster itself needing replaced as it can be common to fail internally electronically causing the mileage issue you see here.
This will have to be tested further to be sure but both of these can be common components to fail.
Thanks Pete
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Customer reply replied 2 years ago
When I open trunk and close
After 5min later EIS key turn overAlso engine running with trunk open?
Abs BAS .battery light. Air Suspension malfunction light onto
Close trunk after few min later normatrunk wiring system looks ok
Because trunk open with (using screw driver just trunk latch manually close system few minute later normal)
This symptom EIS issue?Also using used cluster and used EIS possible ok?(reprogrammable?)
Thanks
Mercedes Mechanic: Pete, Mercedes Mechanic replied 2 years ago

The EIS can cause a fault like this here.It causes several electrical issues when it acts up.Unfortunately the EIS would need to be replaced with a new one as well as the instrument cluster as they can only be programmed to one vehicle and the programming after install has been done has to be done with a dealers SDS machine.

I would start with having all of the fault codes checked using either anSDS machine or a compatible scan tool to check all computers codes.There should be at least one code set that will help diagnose and locate the fault here.

Thanks Pete

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