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S430 wont shift at all after ecu,ignition,shifter replacement!!! help!!

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S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

S430 wont shift at all after ecu,ignition,shifter replacement!!! help!!

 
Old 12-02-2017, 02:08 PM
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2005 mercedes s430
Exclamation S430 wont shift at all after ecu,ignition,shifter replacement!!! help!!

i have a 2005 s430 and the ecu fried it would'nt crank as soon as i put the key in the ignition the fan would go on high mode, so i found a similar s430 i took the key, ignition, shifter, ecu and changed it out and boom it cranks no problem. now it wont shift at all. the dash changes to drive and reverse but nothing happens in the transmission. i checked the shifter rod that is attaches to the shifter to the transmission is fine no issues there. i was told the tcm needs to be changed as well??? in order for it to drive? is that right or do i need to reset something?
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Old 12-03-2017, 04:21 AM
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No the tcm does not need to change

but Are you sure the donor car was the proper year ? The early s430 had a 5 speed transmission while the latter cars has 7 speed transmission like yours

if the parts came from a early car with the different transmission it won't work! Just finding a s430 isn't enough , the part numbers must match
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Old 12-21-2017, 08:20 AM
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Originally Posted by tusabes View Post
No the tcm does not need to change

but Are you sure the donor car was the proper year ? The early s430 had a 5 speed transmission while the latter cars has 7 speed transmission like yours

if the parts came from a early car with the different transmission it won't work! Just finding a s430 isn't enough , the part numbers must match

the donor car was a 2003 or 2002 mine is a 2005. Is that the issue??
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Old 12-21-2017, 09:31 AM
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Yes.

I would think that the most practical option at this point is to remove the units and sell them on eBay, and try to find a set of the correct units.
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Old 12-21-2017, 08:57 PM
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Originally Posted by wallyp View Post
Yes.

I would think that the most practical option at this point is to remove the units and sell them on eBay, and try to find a set of the correct units.
Agree with this option. Sell the working parts, and use the money to get the proper ones you need.
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