Engine Performance / Check Engine Light On (09.20/19)

Publication date: 2005-01-13
Reference number: 09.20/19

ENGINE PERFORMANCE / CHECK ENGINE LIGHT ON

TECHNICAL SERVICE BULLETIN

Reference Number(s): P-B-09.20/19, Date of Issue: January 13, 2005

MERCEDES-BENZ:	Model 171.456
GROUP:	09 - Air Intake, Turbocharging

SUBJECT

Model 171.456

Engine Performance / Check Engine Light On

SERVICE INFORMATION

If you receive customer reports in the above model vehicles of engine runs rough at idle, poor performance, hard starting and/or check engine light activated (possible but not limited to one or more of the following codes stored in the engine control unit 0745, 0749, 0632, 0633, 0636, 0637, 0640, 0641, 0644, 0645, 0649, 0653, 0656), exchange the intake manifold module to resolve.

The condition may be caused by the vacuum hose for the vacuum supply for the air routing flaps and turbulence flaps at the intake module being cracked or torn off (Fig 1 and Fig 2 ). Consequently, un-metered air is entering the engine causing the above condition.

NOTE: Only vehicles up to production date 8/04 may be affected.

Fig 1: Vacuum Supply Hose For Air Routing And Turbulence Flaps

Fig 2: Vacuum Supply Hose Damage

PARTS INFORMATION

Qty.

Part Name

Part Number

Intake manifold module

A272 140 20 01 ⁽¹⁾

⁽¹⁾	Parts are in a critical supply situation and will be limited, please see the PAC weekly status report on parts availability status and delivery expectations. This report is located on the PAC website.

NOTE: The following allowable labor operations should be used when submitting a warranty claim for this repair.

IN CASE OF WARRANTY

Operation:

Short test, perform (54-1011)
Resonance intake pipe, replace (14-1965)

WARRANTY INFORMATION

Damage Code	Operation Number	Time (hrs.)	Model Indicator (s)
07213 04	54 1011	0.3 hrs.	00
07213 04	14 1965	2.1 hrs.	X1