P2005 on Mercedes-Benz
Intake Manifold Runner Control Stuck Open (Bank 1)
P2005 on Mercedes-Benz vehicles indicates intake manifold runner control stuck open (bank 1). Au7o has documented this code across 1 Mercedes-Benz model — most commonly on E-Class. This code means the engine computer detected that the intake manifold runner control (IMRC) for Bank 1 is stuck in the open position. The IMRC system uses flaps inside the intake manifold to change airflow length and velocity depending on engine speed, improving low-end torque and high-end power. When the runners are stuck open, the engine can't optimize airflow, which may cause rough low-speed running, reduced power, and a check engine light. It is not an immediate breakdown risk but should be addressed to restore performance and pass emissions. Typical repair costs on Mercedes-Benz range from $400 to $2,500, depending on the specific model and root cause.
Common Causes of P2005
- •Carbon buildup jamming the runner flaps
- •Stuck or seized IMRC actuator
- •Broken or disconnected runner control linkage
- •Failed vacuum-operated runner actuator or leaking vacuum line
- •Faulty intake manifold runner position sensor
- •Wiring or connector fault to the IMRC solenoid
- •Damaged intake manifold runner assembly
P2005 on Mercedes-Benz by Model
Mercedes-Benz E-Class(2 issues)
- OM642 Diesel Intake Swirl-Flap Actuator Motor (M55) Failure and Carbon-Clogged Intake Runners Causing Limp Mode2007-2015
On the OM642 V6 diesel used in the E320 CDI/BlueTEC and E350 BlueTEC, the swirl-flap actuator motor sits low on the intake and is directly under the turbo intake seal, which is itself a known oil-leak point. Oil drips onto the motor and kills it, and the plastic linkage arm between the motor and the flap shaft snaps. At the same time EGR soot builds up in the intake runners until the flaps physically seize. The result is P2004-P2007 / P2015-type intake runner faults, limp mode capping the engine around 3000 rpm, rough idle and poor throttle response. Owners on BenzWorld and MBClub consistently report that replacing the actuator motor alone without cleaning the intake results in a repeat failure within 20,000-40,000 miles.
- M272 V6 Intake Manifold Swirl-Flap Lever and Bushing Failure (P2004) Causing Rough Idle and Reduced Power2006-2011
The M272 3.5L V6 intake manifold uses plastic swirl flaps on a shaft driven by a small plastic actuator lever. Heat-cycling makes the lever and the shaft bushings brittle; the lever cracks or the bushing wears through, so the flaps no longer move and the ECU sets P2004/P2005 (intake runner stuck open) plus P0521-type actuator complaints. Owners report a rough or hunting idle, a noticeable flat spot off idle, and reduced low-end torque. The bigger risk is that a broken flap or its retaining clip drops down a runner and gets ingested by a cylinder. Because the manifold is a single plastic assembly, Mercedes only sells the whole manifold, which is why owners on BenzWorld/MBWorld debate repair kits versus replacement.
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View P2005 across all makes →Frequently Asked Questions
What does P2005 mean on Mercedes-Benz?▼
P2005 stands for "Intake Manifold Runner Control Stuck Open (Bank 1)." This code means the engine computer detected that the intake manifold runner control (IMRC) for Bank 1 is stuck in the open position. The IMRC system uses flaps inside the intake manifold to change airflow length and velocity depending on engine speed, improving low-end torque and high-end power. When the runners are stuck open, the engine can't optimize airflow, which may cause rough low-speed running, reduced power, and a check engine light. It is not an immediate breakdown risk but should be addressed to restore performance and pass emissions. On Mercedes-Benz specifically, this code is documented across 1 model.
What causes P2005 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Carbon buildup jamming the runner flaps, Stuck or seized IMRC actuator, Broken or disconnected runner control linkage, Failed vacuum-operated runner actuator or leaking vacuum line, Faulty intake manifold runner position sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2005 on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $400 to $2,500, depending on the specific model and root cause.
Which Mercedes-Benz models have P2005 documented?▼
Au7o has documented P2005 on 1 Mercedes-Benz model: E-Class.