Help and advice would be very much appreciated. Having some automatic transmission issue causing the car to go Limp mode. Car would drive but 30min into drive and the gear indicator and driving mode (P,N,R, D & C,S,M) in dash would disappear and reappear intermittently but would end up disappearing after causing the car to go Limp Mode. Scanned car with generic obd2 and it came with U0101, P0705 & P0720 (lost communication with TCM, Transmission Range Sensor Circuit Malfunction & Output speed sensor circuit malfunction). The failed fix I have done so far to tackle this issue includes (in order); 1) topped up ATF oil to correct level (i.e. between the low and high marker at 80*C) 2) inspected TCM for oil whicking through the wires (no sign of liquid damage) 3) inspected 13pin connector for oil leaks on the auto gearbox and found a bit oil because I spilled some whilst topping up and the fluid run down the feeder pipe all the way down to the gearbox casing (although I should inspect this again just to make sure). 3) changed battery with new one 4) replaced gear selector module with a used one Just to note, whilst inspecting TCM which was located underneath the passenger side foot area (bulkhead), I noticed that the area was damp and the NVH pad and the wiring harness going to TCM was wet (see attached photo). I inspected the leafscreen and found that the drain hose was not on properly to the leafscreen and it was also blocked. Unblocked now and fitted correctly into place. I am not sure if the wiring harness is damage since it got wet but I thought I should check this since one of the code I got from Mercedes Dealers was an issue with CANBUS message from control fault (MB Star code: 2211001) after an hour session on the MBstar. So I would like to ask if anyone knows where I can get a electical schematic for my CLC 2008 CL203 so that I can check wiring continuity with a multi meter? I am learning as I go along trying to fix this car and its been 2 months now since I have tried to fix it myself, hopefully there is light in the end of the tunnel. Any suggestion is welcome!