“No,” he whispered. “No, no, no…”

The customer, a nervous woman named Mrs. Alvarez, peered into the van. “Is it fixed? The dealer said they’d need three weeks for a ‘network diagnosis.’”

He navigated not with a mouse, but with the physical buttons along the bottom edge. He launched the oscilloscope function—something his dead laptop couldn’t even do without a separate $800 module. He clipped the DS100E’s included breakout box into the Audi’s CAN bus network. Within three minutes, he saw the problem: the clock spring signal was intermittent, but more importantly, the showed a voltage drop on pin 6 of the OBD-II port. Not a module failure. A corroded ground behind the kick panel.