xpl0sive

well i don't see a reason to spend money on aftermarket high flow cats if I dont need them.

TTMotorsports

EXACTLY!

komp55: The O2 extenders that I use aren't sold on Ebay.

chawkins2001

On my old e55, I had installed kleeman headers and sent my ecu to cory, he did his magic and all was good.

I would listen to the advice of Bruce by taking it to the stealer for a complete stock reflash. Make sure you are right there, so they dont beat on your car with a stock ecu, but you having modded car.

komp55

You're lucky you must live in an area where emissions testing is lax. Just saying if you'd gone the cat route and extended the rear O2s, this thread wouldn't exist. And your car would be just as fast. But as you said, it's your $$$ so you get to spend or not spend them as you choose. Good luck getting the ECU restored to operable condition.

Did someone say they are?

raleigh29

Update #1

Just to close the loop here. I took my car to Beckmann Technologies http://www.beckmanntechnologies.com/ to have them look around.

They played around with the ECU for a few hours and figured out that the ECU number that was currently in the ECU's memory did not match what a CLS should have. They tricked the coding string to recognize my ECU, connected to Germany via SDS and recoded my ECU to stock with new SCN coding.

So, ESP light, ABS light, Cruise control, Tire pressure and my power steering are back now.

I went ahead and got 02 extenders from TTM and my CEL is now also clear.

The only problem I have left now is my battery. For some reason the alternator is not charging the battery's. I put brand new OEM batteries in the car and I cant get rid of the red battery warning message on the cluster. They may be totally seperate issues, but after talking with the owner of Beckmannn, he told me that the ECU and SAM have inputs into the alternator circuit.

Beckmann still has the car and is continuing troubleshooting the battery not charging issue.

stevebez

Pretty strange stuff going on with your car I have not heard of before!

novae500

Could it be your battery control module or the voltage regulator for your alternator??

raleigh29

Thats what they are looking at now. probably one of the 2

raleigh29

Update #2

I replaced the voltage regulator last night and still no charge. Dyno mode showing voltage at 11.0 and Torque app showing 10.5.

Got the Battery/Alternator red light of death telling me to stop car.

It's at my indy shop for diagnosis. It may be the Battery Control Module, Dead Alternator (Hope not.. those damn things are expensive), Front SAM unit or the relay that supplies power to the aux battery. I have bought new OEM batterys for main and aux in the last week so I know thats not the issue.

raleigh29

Update #3 :

Alternator was dead. It took a while because of the double failure of ECU and battery system.

All good now.. no CEL, no message warnings.

All thats left is for EC to tune the car again, which I am a little weary about after all the ECU problems.

Endri55k

hello bro iam having exactly problem with my cls55 esp abs hard steering after try to delete 02 sesnor on devs mode,please can you help how you reaolve the problem