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Swap used ME 2.0 Engine ECU In / Virginise?

21K views 37 replies 6 participants last post by  sbambakidis_4668  
#1 ·
Thought I would put this on a dedicated thread to hear other members experiences on this subject.

Recently when carrying out engine work on my 1999 S430 I discovered corrosion on the engine ECU plug. Aparantly this is typical on V8s(?) So a breakers yard told me. The harness sheath is open to elements so I intend to seal / wrap the first foot from fuse box now too for additional protection.

This is my original ECU:

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This is the damaged pins - too deep to repair one pin is toast!

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Now I have purchased a used ECU with identical part numbers from flea bay:

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However since this is a theft related part in the w220 the car will not like the replacement ECU.

Therefore I need to clone the original "immob data" from my original ECU OR virginise the replacement ECU so the car can accept it.

Thoughts?

PS I spoke to a friend of mine who is an automotive locksmith. He looked at my photos and identified the following chip as 99% likely containing the immob data:

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He suggests he swap this over to the replacement ECU and I test in car. It has no engine in it but I presume I could still plug it into the car and see the drive authorisation status with my Star? I could check with this ECU first then change the chip over.
 
Discussion starter · #2 ·
Additionally - I presume this ECU will require coding checked yes? (Since it is used and could have came from another chassis etc)

To that end is there any benefit in also moving over the centre motorola chip? I presume not and that the version coding should be straight forward unless the same Engine ECU could have came with only 5.0 running inside it say? Noob questions I know whilst my friend is an expert in Immob Data etc he asked me to verify if anything else from the old ECU is specific to the engine etc that I cannot code myself.
 
Discussion starter · #8 ·
Thanks all for replies!

ME2.0 has no eeprom with immo data unlike newer ECU. Everything is stored in that Motorola 4e28b processor. You swap that, you also swap the immo, coding, everything.
Thank you for that - so if I have my guy swap the centre Motorola chip that should be all that is required? Leave the 8 leg chip alone?

He can read all chips by the way and he understands what is on them or at least if it looks like Immob data. He can also copy and alter the contents of any chip to virginise it etc he has all of that equipment.

This older MB stuff is tricky somewhat simply because he doesn't see it very often at all.
 
Discussion starter · #11 ·
To close this one out - this worked!!

Physically moving the Motorola chip over to the used ECU was successful in carrying over the original:
  • VIN
  • Coding
  • Start Authorization
All good now just need to get the engine back together and back in.
 
Discussion starter · #13 ·
But the burning question is ...................

Did you swap the Chip or get your locksmith Buddy to do it ??? :D
I was going to his place regarding an Architecture project so I brought the ECUS with me Sat and in about 10 mins he moved the chip. It's what he does every day of the week so it's easy for him. For me not so much :)