P2B2A · Manufacturer communications

MERCEDES-BENZ, MERCEDES-MAYBACH · 2026-02-24

Complaint Customer states that the yellow "Coolant" message is populated in the instrument cluster. The following DTC is found stored in the PTCU: P2B2A7A - The speed of the 'Coolant pump' component part is too high. A leak or defective seal was detected Notes on fault code: The fault code concerns the right rear 15 W pump on the side of the transmission (Figure 1, position C). The fault code concerning the speed that is too high is set because of air in the system (emergency dry run function) IMPORTANT: This LI DOES NOT APPLY to model year 2024 and newer vehicles. For model year 2024 and newer vehicles pump PN's A0005009100 and A0005008900 are the correct pumps Cause Air in the low-temperature coolant circuit Remedy PLEASE READ ALL THE STEPS AND FOLLOW THEM IN ORDER. Step 1: With the…

MERCEDES-BENZ, MERCEDES-MAYBACH · 2024-07-27

Complaint Yellow "Coolant" message in instrument cluster • Compare the sound and feel of each pump. An improperly functioning, bled, or faulty pump will make a very distinct churning noise. The pumps should be near silent and should not vibrate or heat up. • If you find a pump that is making more noise than the others it is most likely pulling in air from somewhere or is encountering a restriction (refer to the first point in this section) If nothing of note is found, proceed to step 2. Step 2: Disassemble underfloor paneling and wheel well interior trim at front right to gain access to the two low temperature pumps. Take note of or photograph the part number of the pump holder, along with the production date. Step 3: Check the installation position of the pumps at the front right of the…

AUDI · 2024-01-23

This bulletin provides information for when there is an electric drive fault, cooling system B16A284 B16A285 B16A384 B16A385 P053400 P0CE900 P139B00 P2B2A00.