Mercedes Benz reports intake manifold failure

Vehicle Information: Mercedes-Benz S300

Engine Model: 272

Engine displacement: 3.0

Year of vehicle production: 2012

Kilometers: 132697

intake manifold

Fault phenomenon:

The customer responded to the call, and it suddenly lighted up while driving on the highway yesterday

Check engine light, so check it out in the shop today

Failure analysis（Intake Manifold）:

We use 431 to read the fault code as: intake manifold branch pipe passage

Control stuck in closed position (cylinder bank 1), when using 431

Carry out the action test of the intake manifold, and the intake manifold is vacuumed.

After inspection, it was finally found that the triangle plate under the intake branch pipe was damaged.

Solution:

Because this is a common problem with the intake manifold of Mercedes-Benz 272, it is directly Replace the repair kit, troubleshoot Benz 272 intake branch pipe fault summary.

The function and principle of the intake branch pipe:

The main function is to change the intake air volume, which is controlled by the solenoid valve Vacuum suction, the vacuum pump sucks the strut up through the vacuum suction,Subsequently, the movement trajectory of the internal replica of the intake manifold is changed, 272Working stroke of engine intake manifold, short stroke at low load,

Long strokes for medium loads and short strokes for high loads.

Problems with the intake manifold will affect:

Engine check light comes on

Weak acceleration, easy to stall

Insufficient power while driving

The higher the speed, the higher the fuel consumption

Intake branch pipe detection:

The computer reads the fault code and uses the computer to perform the action test

The action test is moving, check if the replica is broken,

Or the inside of the intake manifold is damaged

The action test does not move, check whether the solenoid valve is working,

Is there a leak in the vacuum tube?

Solution: Replace the assembly or repair kit

For more Mercedes-Benz click this article