Can i buy an extra ECU for a tune?
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From: SoCal
2014 E63s
Can i buy an extra ECU for a tune?
I'm thinking to buy an extra ECU and have it tuned/installed leaving the original available for if/when it needs to go to the dealer. Will this guarantee my warranty won't be void? this will also eliminate the needs for a refresh should the dealer need to reset the ECU. Does any of this make sense to anyone else or am I overlooking something?
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From: SoCal
2016 AMG S65, AMG GL63, 2012 AMG E63 With AMS Alpha 9 Package, Renntech 200 Catted Downpipes.
That is a interesting thought and a great question. I was reading on the forum that if Mercedes/AMG can trace the digital residue somehow. Would be interesting the see the comments from the experts here. Good luck.
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
From previous platforms, ECUs have always been vin coded so you can't use one from another car. However, you can have multiple ECUs coded to your vehicle.
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Is a great question, and it has been discussed before about a year ago and perhaps even before then, and the final conclusion was that the dealer has to be involved to code the ECU in the proper way
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From: Tbilisi, Georgia
2012 CLS63AMG Kleemann K3
There are quite a few used ECUs on car-part. I bought a second ECU for 110 GEM Octane Fuel. I bought it used for 250USD for my 2012 CLS63 AMG. if you buy it used just send both ECUs to your tuner and they will make a clone. well at least Kleemann can do 
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
I highly doubt you bought a used ECU for $250 and am even more skeptical Kleemann was able to erase the old vin coding and rewrite it with yours.
Last edited by chiromikey; Sep 7, 2015 at 09:12 PM.
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2003 W211 E55, 2003 W220 S600
dealership will only sell you a new ecu if your current one is bad. Car has to be present at the dealer and dealer has to confirm ecu is faulty before ordering one. No legal way around this.
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2016 AMG S65, AMG GL63, 2012 AMG E63 With AMS Alpha 9 Package, Renntech 200 Catted Downpipes.
Didn't know a used ECU was so cheap, but if your going with a tune. Go with a reputable tuner. If something goes wrong, you can ask them to fix or face the consequences. In Asia, when you buy something, it's yours for life. No returns. In good old us of a, anything is possible. I know it sounds I sound I trust Renntech, but I do.
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2016 AMG S65, AMG GL63, 2012 AMG E63 With AMS Alpha 9 Package, Renntech 200 Catted Downpipes.
I would think if a Merceded ECU was bad, Mercedes verified bad that they replace it for free? Warrantee or not. Just saying.
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
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From: Houston
2003 W211 E55, 2003 W220 S600
Are you sure you can get a second ECU form the dealer for a 2012 and up MB? I have tried multiple sources from SA, parts guys, shop foreman etc
ME28 can be recoded. The E63TT have a tamper proof case hence they have to be drilled in order to load the eprom file on it via direct pin contact on the PCB
ME28 can be recoded. The E63TT have a tamper proof case hence they have to be drilled in order to load the eprom file on it via direct pin contact on the PCB
Last edited by shardul; Sep 8, 2015 at 04:34 PM.
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From: SoCal
2014 E63s
FYI I was approached by a tuner(one of the top 5 for our cars)and was offered an ECU to use as the "tuned" ECU keeping my original one as is for future warranty issues should the need arise. i'm hoping to hear back from them with a price and if it makes sense thats the route i'll be taking. I'm assuming if this tuner can do it than theres no need for the dealer. I'll update as things progress.
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E63s
You can have two ecus programmed to one car. I can clone the ecu. The dealer won't do any work on a used ecu. They don't have knowledge to do stuff like this. Even if you get a new ecu, the way the dealers work is transfer the info from old ecu to new one but this deletes the old ecu. For all this to happen you have to clear the used ecu fist, before you tie it to your car and vin. The only way to clear the used ecu is to put it in bootmode which can only be done by taking the ecu apart. There is also another way to do it, without opening it up. But to do this i will need both of your ecus, used one and the one that is tied to the car. I must say again i have never heard of anyone do such things on m157 platform ecus. I have done it to 7 cars, all of them run tune and have stock ecu for backup in case of warranty.
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From: Boise ID
2014 E63 S, 2017 GLE 43, 2020 Cadilac Escalade, 2019 Lamborghini Performante
I have 2 ECU's , all that needs to be done is to clone your existing ECU onto the new one...
best way to buy an ecu is on ebay. Take off your ECU and look up the serial code on the bottom of it...type that into ebay and buy an used ecu..ship it to ur tuner and enjoy your tune
best way to buy an ecu is on ebay. Take off your ECU and look up the serial code on the bottom of it...type that into ebay and buy an used ecu..ship it to ur tuner and enjoy your tune
