2000 C230 k limp mode/TCM problem?
Is there any way to check the unit myself, perhaps by checking the voltages at the pins?
Do I need a brand new unit, I saw that I could get the exact same part (with identical part number A 024 545 83 32) out of a C280 for $200.
I really don't trust the indy shop I went to. He charged me $260 to diagnose the problem ($170 for the computer check, plus $110 for some misc. labor), and since his solution is to replace a $1200 part plus labor, I would like any opinions I can get before moving forward.
Also my shifter is acting up. Whenever I shift into drive, I cannot shift back past nuetral into either reverse or park. I have to turn off the car to shift into park, or sometimes I can do it by tapping the brakes. Could this be why my car is in limp mode?
Thanking in advance for any advice,
ray

Before we waste everybody's time by guessing. Don't replace the TCU just yet. You have paid for this diagnosis. Please go and ask the guy for a list of the trouble codes he downloaded & post them here. Then we can take things forward. You paid for these codes - they belong to you. Don't take any crap.
Good luck
Anyway I'll describe the printout of the error codes I was given. The top left of the screen printouts says "Bosch" so maybe that's the tool he's using.
At the top of the 1st page it says: "Control module diagnosis MERCEDES BENZ EGS 1.0/3.0 (EGS 51) Error Memory" and there are 7 error codes:
34 CAN communication to engine CU or comm. to EWM CU. (via CAN) -signal improbable
116 Transmission oil temperature sensor or starting lock -Defectice or inoperative
130 CAN communication to engine CU or comm. to EWM CU. (via CAN) -signal improbable
132 CAN communication to engine CU or engine temp. (via CAN, engine CU) -signal improbable
134 CAN communication to ABS/ASR/ESP -Fault in CAN communication
135 CAN communication to engine control unit -Fault in CAN communication
136 CAN communication to combined instruments -Fault in CAN communication
The mechanic claims to have cleared all the codes except for 34 and 130, and this is why he thinks I need a brand new $1200 Transmission Control Module (or EGS).
On the 2nd page of errors the tops says "Control module diagnosis MERCEDES BENZ Motronic ME 2.1 Error memory" and the 1 error is:
103 Selector lever -error detected
Thank you again,
Ray

Please get hold of a standard OBDII/CAN scanner - borrow from Autozone or whatever & download the codes in Mercedes language from the plug under your steering column behind a little flap.
Do I need a brand new unit, I saw that I could get the exact same part (with identical part number A 024 545 83 32) out of a C280 for $200.
034 - No Fault Text
116 - TOT Y3 - 6BL Starter Lockout Contact Y316
130 - CAN ENGINE MANAGEMENT COMMUNICATION FAULTY
135 - SPORADICALLY FAULT WITH MOTOR ELECTRONICS
148 - SPORADICALLY TCC IMPERMISSIBLE CLOSING
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Also can you tell me exactly where the CAN is located and is it possible that the problem is coming from that point and not the tranny?

You need to check the TCU for oil and the Electrohydraulic bush. This should be the next step. Please also check that your fluid level is correct. The car is stuck in limp mode. If oil is semi shorting the pins in the bush it will create havoc with the CANBUS as it is sending wrong values to everything which would tie in with improbable readings the OP was getting. The Standard P codes that you are getting have nothing to do with the problem. An O2 sensor failing can't cause what you describe. If you are on another machine that is reading transmission codes & not P codes you might have a bad TCU but more likely a leaking electrohydraulic bush. Pray it is the bush - much cheaper & easy DIY. I carry a spare $8 bush in my car waiting for the day it gives trouble.
See this thread
https://mbworld.org/forums/c-class-w...sues-help.html
Last edited by Glyn M Ruck; Dec 3, 2010 at 08:21 AM.

It can be many things including the shifter or shifter interlock with the brake pedal. Your car is right at the brake pedal switch deletion.
Is the car post facelift?
Secondly see my thread about this, I had the same problem and it was not expensive to fix. Post your results and see if the code is the same as mine
https://mbworld.org/forums/c-class-w...ode-p1856.html
Do not start buying stuff according to my thread part number since facelift model has theft coded switcher module, make sure about the error code first!









