2014 Navion iQ 24V check engine light
have a P246F (exhaust gas temp sensor bank 1 sensor 4) check engine light on. Diesel mechanic (NOT an MBenz guy) says turn off the light and see if it comes on immediately or after 25 miles of driving. He also says you can turn the light off by removing your positive battery connection and replacing.
Although I have almost no faith in our local MBenz dealership, I am seriously concerned about unhooking the positive battery terminal based on the complexity of Sprinter 3500 chassis.
Does anybody have any advice on this situation? My guess is that the battery disconnect under the dash near the accelerator probably will not clear the code? Any idea how much repairing an exhaust gas temp sensor could be? Basically I am trying to get it fixed without going to local MBenz dealer or if I have to go to them, I want to be able to fend off any unreasonable efforts at upcharging...I have been down that road with them before.