P0463 on a Mercedes-Benz: Causes, Fixes & Repair Cost

🟢 Low severity · drivable

Safe to drive, but the fuel gauge may be wrong — track your miles or fill up often so you don't run out of gas.

What P0463 means on a Mercedes-Benz

On a Mercedes-Benz, P0463 means the fuel level sender is sending a signal that's too high, so the computer reads the tank as full. The sender is integrated with the fuel pump module on many models, and its resistor strip wears with age. The engine runs normally; the fuel gauge is what's affected.

Is P0463 common on Mercedes-Benzs?

P0463 is seen on higher-mileage Mercedes models like the C-Class, E-Class, and GLC. Sender wear is the usual cause, and some models use more than one sender in the tank. It's a gauge problem rather than a drivability problem.

Commonly reported on: C-Class, E-Class, GLC.

Symptoms

Check engine light on
Fuel gauge stuck on full
Fuel gauge reads wrong or drops suddenly
No change in how the car drives

Common causes

most common: Worn fuel level sender
common: Corroded connector or wiring at the sender
common: Faulty sender inside the fuel pump module
less common: Faulty instrument cluster reading

How to fix it

Fix	DIY?	Typical cost
Inspect the sender wiring and connector	Yes	$0–50
Replace the faulty fuel level sender	Mechanic	$250–600
Repair sender wiring or connector	Mechanic	$80–200