2018 Mercedes-Benz P0087: What It Means & Is It Safe to Drive?
P0087 on the 2018 Mercedes-Benz: Fuel Rail/System Pressure – Too Low. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The actual fuel rail pressure is lower than the PCM commanded. On direct-injection engines the high-pressure fuel pump is the primary suspect; on port injection engines the lift pump or filter is most common.
Common causes on the 2018 Mercedes-Benz
- Failing high-pressure fuel pump (direct injection engines)
- Weak low-pressure lift pump
- Clogged or restricted fuel filter
- Leaking fuel pressure regulator
- Restricted fuel supply line
Symptoms
- Check Engine Light
- Hard starting, especially when hot
- Stalling or stumbling under load or acceleration
- Rough idle
Typical fixes
- Replace high-pressure fuel pump (GDI engines)
- Replace low-pressure (in-tank) fuel pump
- Replace fuel filter
- Inspect and replace fuel pressure regulator
Repair cost range
For a 2018 Mercedes-Benz, repairs for P0087 typically fall between $200 and $1200, depending on the root cause and labor rates in your area.
Known issues on Mercedes-Benz
Mercedes M272 P0087 low fuel pressure typically indicates a failing in-tank fuel pump. The fuel pump module on Mercedes W204/W212 is accessible from under the rear seat. Use XENTRY to activate the fuel pump and check rail pressure before removing the module.
Most commonly affected models