Mercedesbenz Errorp061a98 Top Patched 🆕 Full

On models like the W206 C-Class or W223 S-Class with the M254 engine, a failing 48V lithium-ion battery causes brownouts (voltage dips below 36V). The TCU is sensitive to voltage. If the 48V battery dips during the "Top" (start-stop engagement), the TCU logs P061A98 as a collateral fault.

Tonight, frustrated and alone in the shop, Elias decided to trace the CAN bus physically. He followed the twisted pair of wires from the engine bay to the glove compartment, then behind the dashboard. Behind the infotainment screen, hidden under a false panel, he found something Mercedes never installed: a secondary black box, no bigger than a pack of cards. It was warm. It was not in any wiring diagram. mercedesbenz errorp061a98 top