Mercedes-Benz Clase G (W463A) common problems.

Engine / equipment

OM654 2.0 and OM656 3.0 diesel (C, E, S, GLC, GLE, GLS, G-Class from 2016)

Period mentioned

2016–2026

Symptoms

AdBlue or emissions warnings with a start countdown; particulate filter warning; power loss or rough idle from a dirty EGR.

Possible cause described

These are robust engines; faults concentrate in the emissions system. The AdBlue system (injector, NOx sensors and SCR catalyst) sometimes fails, especially in the cold, and the particulate filter and EGR foul if the car mostly does short trips.

Check for the garage

Read AdBlue and NOx sensor codes with Xentry, check the particulate filter regeneration history and how the car is used (short trips).

Cost cited in the source

AdBlue system: approx. €500–1,200; particulate filter: €1,000–2,000A rough figure from the original database, not an up-to-date quote.

Mileage cited in the database: from 100,000 km. This is not a maintenance interval and does not predict a failure.

Sources from the original database

Engine / equipment

Mercedes G-Class W463A (G 350 d, G 400 d, G 500/550 and AMG G 63)

Period mentioned

2018–2021

Symptoms

ABS and ESP warning lights on; loss of anti-lock braking and stability control.

Possible cause described

The front-axle harness can rub against the oil cooler and be damaged. There were campaigns in the US (NHTSA 23V-097, 2019–2021 G 550 and AMG G 63), Japan (15,705 cars) and Hong Kong: a protective sleeve is fitted or the harness is replaced.

Check for the garage

Check by VIN at the dealer that the campaign has been done.

Cost cited in the source

Free under the recall.A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Engine / equipment

Model-year 2025 Mercedes-Benz G-Class (W463A), including the electric G 580

Period mentioned

2024–2025

Symptoms

If the ESP fails, the cluster shows the wrong warning light; automatic emergency braking, lane keeping assist or Distronic stop working.

Possible cause described

Two US recalls: 25V-254 (6,247 2025 G 550, G 580 and AMG G 63), because the wrong warning light may come on when the ESP fails (the ESP control unit software is updated), and 25V-711 (a few 2025 G 580 and AMG G 63), because the circuit board of the front short-range radar sensor may fail, leaving the car without automatic emergency braking, active brake assist, lane keeping assist or Distronic (the sensor is replaced).

Check for the garage

Ask a Mercedes dealer by VIN whether both campaigns have been done.

Cost cited in the source

Free under the recall.A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Engine / equipment

Mercedes-AMG with the 4.0 twin-turbo V8 M177 (C 63, E 63, GLC 63, GLE 63, GLS 63 and G 63)

Period mentioned

2015–2025 (US model years)

Symptoms

The engine warning light comes on and the car may lose power, with throttle codes such as P210185, P213500 or P213600.

Possible cause described

Electrical resistance increases in the pins of the left and right throttle actuator connectors. Mercedes-Benz describes it in its technical note LI07.10-P-080384: the connector pins are replaced with updated ones.

Check for the garage

Ask the workshop to check the connectors of both throttle bodies and apply note LI07.10-P-080384 before replacing the throttle bodies.

Cost cited in the source

No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Sources from the original database