- Nov 20, 2004
- Reaction score
- Your Mercedes
- R230 SL350 2006, W208 320CLK, W124 230CE, W201 190E
I have a SL350 (R230) 2006 with a 5 speed 722.6 box that's occasional sticking in 3rd when warm in Sports mode but not when in Comfort mode. No engine management lights coming on. Getting a OBD-11 code 715 defined as 'input/turbine speed sensor circuit A malfunction' but if it were a speed sensor issue I would have thought both modes would have been affected? Also, when it gets stuck in 3rd in Sports Mode I can't change the selector from 'Sport' to 'Comfort' until I stop the engine and restart. The sticking issue then disappears for a while too. Gearbox smooth with no jerkiness. I've had the adapter for the 13 pin plug changed but no improvement. Had a transmission oil change recently as well but this started before that. Should I change the speed sensor and lead next (I think it sits on top of the flywheel bell housing) or bite the bullet and get the conductor plate changed?