P0106 on a Mercedes-Benz: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can usually drive a Mercedes short-term with P0106, but a wrong pressure reading can cause rough idle and hesitation, so fix it soon.

What P0106 means on a Mercedes-Benz

On a Mercedes-Benz, P0106 means the manifold absolute pressure (MAP) sensor signal is outside the range the engine computer expects. The engine control unit compares the intake pressure reading to throttle position and speed and finds a mismatch. This usually points to a vacuum leak, a dirty or failing sensor, or a blocked sensor line.

Is P0106 common on Mercedes-Benzs?

P0106 shows up on Mercedes vehicles where vacuum lines and intake seals age, and the MAP sensor element gets contaminated over time. Cracked rubber lines under the intake and a dirty sensor are the usual findings on this brand. It is a sensor or vacuum fault, not an engine failure.

Commonly reported on: C-Class, E-Class, GLC, GLE.

Symptoms

Check engine light on
Rough or surging idle
Hesitation when accelerating
Worse fuel economy

Common causes

most common: Vacuum leak from a cracked or loose hose
common: Dirty or failing MAP sensor
common: Restricted or pinched sensor line
less common: Damaged wiring or connector to the sensor

How to fix it

Fix	DIY?	Typical cost
Inspect and replace cracked vacuum hoses	Yes	$20–100
Clean the MAP sensor and its port	Yes	$10–25
Replace the MAP sensor	Yes	$90–240
Repair damaged sensor wiring or connector	Mechanic	$80–200