[HELP!] 05 Mercedes SL500 - limp transimssion?
 

Hi everyone - I have a 2005 mercedes sl 500. It runs and drives mostly fine. Yet, when I give the car a lot of gas, the car jerks and loses power. The transmission appears to go into a limp mode, but once I pull over/restart the car, the problem is gone. Any thoughts on why this is happening?

Here are the fault codes:
The check engine light is on
P0730 incorrect gear ratio

Yep. Get it scanned and I bet you have the dreaded turbine speed sensor failure. It will keep getting worse. You need to replace the speed sensors in the transmission conductor plate. Best to pull the conductor plate and send it to Circuit Board Medics. There are some YouTube videos on how to remove it. Not too hard (once you've done it). Or, take it to a shop that knows what they're doing to pull it. You will be without your car for several days.

Scan the transmission and see if any of these come up. Get yourself an . Best $150 you'll spend on your car. (If the link sends you to Walmart, just search for iCarsoft MBII on Amazon.)

• Y3/8N1
  • 0715 - Input/Turbine Speed Sensor Circuit Malfunction
  • 0716 - Input/Turbine Speed Sensor Circuit Range/Performance
  • 0717 - The signal from component Y3/8N1 (Turbine Speed Sensor (VGS)) is not available
  • 0718 - The signal from component Y3/8N1 (Turbine Speed Sensor (VGS)) is defective
  • P2204 - The signal from component Y3/8N1 (Turbine speed sensor (VGS)) is not available
  • P2205 - The signal from component Y3/8N1 (Turbine Speed Sensor (VGS)) is defective
• Y3/8N2
  • 2766 - Excessive rpm’s have occurred at component Y3/8n2 (Internal speed sensor (VGS))
  • 2767 - The signal from component Y3/8n2 (Internal speed sensor (VGS)) is not available
  • 2768 - Component Y3/8n2 (Internal speed sensor (VGS)) is defective
  • P2200 - Component Y3/8n2(Internal Speed Sensor (VGS)) is not available
  • P2201 - The signal from component Y3/8n2 (Internal speed sensor (VGS)) is defective
• Y3/8N3
  • 0720 - Output Speed Sensor Circuit Malfunction
  • 0721 - Output Speed Sensor Range/Performance
  • 0722 - The signal from component Y3/8N3 (Output Speed Sensor (VGS)) is not available
  • 0723 - The signal from component Y3/8N3 (Output Speed Sensor (VGS)) is not Intermittent
  • P2206 -The signal from component Y3/8N3 (Output Speed Sensor (VGS)) is not available
  • P2207 - The value of component Y3/8n3 (Output Speed Sensor) is implausible