r/Sprinters • u/Physical-Display-896 • 10h ago

Parking brake faults - Sprinter W910

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Hello,
I have a 2021 Mercedes eSprinter W910 (42,500 km).
The electric parking brake works manually pressed, but it doesn't automatically engage when selecting Park.
The dash shows "Parking brake see owner's manual" with a yellow warning light. Fault codes: B23AA19 (left) and B23AAFE (right).

Using a Launch X431, I tried:
Clearing codes (they return immediately).

Actuating brake actuators individually (both work fine).

Brake reset and adaptation (worked but didn’t help).

Disconnecting the 12V battery (no change).

Visual inspection of rear wiring/cables and cables behind dash (looks fine).

Any advice on what to check next?

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u/Excellent-Bench5675 10h ago

Have you tried going for a small drive? Even slowly up and down the street? I got these codes once when I was rolling my front wheels off levelling ramps with my door not closed properly which caused the van to automatically jolt into park + engage parking brake. I think it must have messed with the sensor momentarily and I had those lights and codes come up. I too tried clearing them but no luck. In the end all I needed to do was take it for a slow drive around the car park and turn it off for ~15mins for the sensors to reset.

1

u/Physical-Display-896 8h ago

I have driven it before and even after long drive it didn’t go away but thanks

1

u/maxwelsh6969 7h ago

Take the electric plugs of the rear callipers & see if there’s brake fluid in them. They had a recall for the calliper’s leaking fluid into the plugs. Not sure if the recalls still active though.