u/Physical-Display-896

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?

Just picked up an E36 318is with M42 from an auction, feels completely dead above 4500 rpm. Found the disa valve unplugged — probably related. A few other things are unplugged too. Anyone know where the other end of the valve’s connector/vacuum hose goes?and also what’s the other things that are unplugged and capped off? Thanks