Originally Posted by
jdsmith
Battery replaced today and I used a Launch diagnostic scanner to wipe the codes and go for a drive. All lights and errors returned after three drive cycles. Same codes as before. This is from the diagnostic report.
1. Traction System RL Wheel RPM Error2. "Rough Road Detection" Signal (by comparing Wheel Speeds) Speed Signal From Control Module ESP Implausible / Read Out Fault Memory of Control Unit ESP (P1999)
3. No CAN Message 'Vehicle Speed Signal Left Rear Wheel' From Control Module N47-5 (ESP Control Unit) or Message Faulty. Read Out Fault Memory of Control Unit ESP (P0500)
4. The Left Rear Wheel RPM Signal Sent From The Traction System Via The CAM Bus Is Implausible
Also
1. B24/2 (ESP Lateral Acceleration Sensor)
Link to report:
Inspection Report
Thanks again for all of the guidance! So far I have a wheel speed sensor coming ($19) and have located the part number for the lateral acceleration sensor to be Mercedes # a1635420618 which appears to be different than the YAW sensor some people have to replace. I'm planning to open the center console to get my eyes on the sensor before ordering it on eBay ($45-80 for a pre-owned). I suppose I can call the local Mercedes dealer in the AM and see if they have the sensor.
Cheers!
I would not open the console or replace the yaw sensor yet. These cars can have strange things crop up when a speed sensor goes. It doesn't hurt to read the service manual and posts about the medium to hard console removal/install but you just might not have to need a yaw sensor. Please remember the OBD codes are only an indication of what system flagged, it could be various different other things (like maybe a defective speed sensor) that is also causing the yaw sensor OBD code popping up. If replacing the speed sensor clears up even one OBD code, you have saved a bundle of $ in your DIY. Good luck!
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