One of my Soldiers owns a 2001 c240, 6cyl gas with an automatic transmission, around 150,000 miles. I have a mechanics background but do not have any experience with Mercedes. I am thinking it is something electrical, with the vehicle is running and the selector moved to any position there is no change in engine RPM's (no engagement). The battery is good (starts but not tested) fluid is full and does not smell burnt. Unfortunately he still owes a considerable amount and does not have additional funds for a large repair or repair shop. So hopefully some of you can offer some suggestions as to getting this vehicle back on the road. Thank You