Mercedes EQC won't start Terminal ignition positive interrupted

Terminal 15 is the switched positive power supply Check the wiring harness and plug connections related to the ignition switch and engine control unit The error memory points to a defective cable or plug so start there

Okay thanks But where exactly should I be looking for these connections Is there a common spot in the EQC where the wiring harness tends to fail or the plug connection goes bad

Without seeing the car it's hard to say specifically Given the error and potential causes it's likely related to the power supply to the engine control unit A workshop would be able to pinpoint the exact location

Understood Thanks for the info I took it to a shop They found a corroded connector on the main wiring harness causing the interrupted power supply to terminal 15 They cleaned it and the car started right up The cost was around 95€ like the initial diagnosis said