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Dead Tire Pressure Control Module (N88 TPM (RDK) Control Unit)...

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SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

Dead Tire Pressure Control Module (N88 TPM (RDK) Control Unit)...

 
Old 06-20-2012, 09:03 AM
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2003 SL500, 2005 ML500 SE, 2005 CLK500 Cabriolet Avantgarde
Dead Tire Pressure Control Module (N88 TPM (RDK) Control Unit)...

Hi there folks,

Your Tire Pressure Monitor Control Module in the trunk (boot), on driver's side may be on its way out. Mine just died and threw up an error code in white that says "Display Defective Visit Workshop!". It only displays dashes (--) instead of pressure read out or numbers.

Initial diagnosis suggests the control module needs to be changed. The irony is that Mercedes knows this module is defective and has gone through 3 part numbers so far for the same module! The current Part number is A 002 820 99 26. Costs about $1000 brand new. I'm looking at other sources.
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Old 11-17-2012, 10:48 PM
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2003 SL 500 / 2000 SL 500 / 1991 300 SL. / 1968 280 SL
Same problem as you..

It seems that I have exactly the same blanks where the tire pressures should be..
We're you able to resolve this problem without paying $1000...
Pls advise..
Thanx
Bruce
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Old 09-27-2014, 01:07 AM
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2003 C32, 2002 S55, 1999 SL500, 2004 S430
any update?
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Old 04-25-2019, 02:32 PM
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Camry 2.0, CLK320, SL350, SL63
New antennas and sensors needed as well?

Originally Posted by egwu View Post
The irony is that Mercedes knows this module is defective and has gone through 3 part numbers so far for the same module! The current Part number is A 002 820 99 26.
Thanks for the info. The TPM control module of my 03 (MY2004) SL350 has gone bad last week hence I need to replace it.

The part number of the module taken out of my car is A0028208326 and the label on it says 433 MHz. I am not sure what does 433MHz mean. I guess it means this control unit is specific for antenna and sensors that communicate each other at 433MHz frequency.

I checked with EPC and indeed the antenna used for my car are using 433 MHz frequency as show in the attached picture.



On the other hand I Googled new part number A0028209926 and found out its label says 315MHz. So does that mean I also have to install 315MHz antenna as well as 315MHz sensors?

If so, do you have part number for 315MHz antenna? As for sensors I see that most aftermarket sensors are transmitting signals at 315MHz frequency which should be good… I suppose.



Last edited by a32amg; 04-25-2019 at 02:35 PM. Reason: grammar error
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Old 04-25-2019, 07:54 PM
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2003 R230
Having to do this too.
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