What is the AdBlue System / Heater Failure problem on a 2019 Mercedes-Benz GLC (X253)?

Common Problems with the
2019–2022 Mercedes-Benz GLC (X253)

We've identified 1 known issue that can affect the 2019–2022 Mercedes-Benz GLC (X253). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2019–2022 period has an average number of reported issues compared to other Mercedes-Benz GLC (X253) year periods.

All Known Issues

AdBlue System / Heater Failure

SeriousExhaust & Emissions

The AdBlue tank heater or pump frequently fails on diesel models, resulting in an engine management light and a countdown until the engine refuses to start.

Most affected: GLC 220 d, GLC 250 d

Estimated cost: £800–£1,500Affects: 2015–2022

Typical symptoms

•AdBlue warning light
•"No restart" countdown message

What to inspect before you buy

✓Check for evidence of AdBlue pump or tank replacement

Buying Tips for the 2019 Mercedes-Benz GLC (X253)

✓Perform a full-lock turn at low speed (e.g., parking) to check for tyre crabbing or skipping
✓Listen for squeaks from the interior trim and dashboard on rough roads
✓Check the AdBlue system on diesel models; "NO restart in XXX miles" warnings are common and expensive to fix

2015–2018 Mercedes-Benz GLC (X253)