Fuel rail to injector seal leak
Fuel smell from the engine bay, occasional misfire, rough running, or in some cases few warning signs before a leak becomes serious.
How to check
Pressure-test the system.
Estimated Repair Cost
£700
Explore common problems, estimated repair costs and practical checks for the 2018 Mercedes-Benz GLA-Class 2.0 Petrol Automatic. Use this guide to help assess a used car, then unlock a personalised report for the exact vehicle you're considering.
Fuel smell from the engine bay, occasional misfire, rough running, or in some cases few warning signs before a leak becomes serious.
Pressure-test the system.
£700
Musty smell, damp headlining, wet carpets or boot floor, condensation after rain, or odd electrical behaviour.
After the drive, open the doors and tailgate and spend a minute inside with the ventilation off.
£800
Stuttering after refuelling or hard motorway use, rough running, engine warning light, or sudden loss of power.
Accelerate firmly once the engine is warm, then let it settle back to a gentle cruise.
£600

It can be, but only if the individual car backs it up. For the 2018 Mercedes-Benz GLA-Class 2.0 Petrol Automatic, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.
The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.
Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.
The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.
Or enter the vehicle manually