Poor Engine Performance (LI09.41-P-044907)

Publication date: 2009-02-02
Reference number: LI09.41-P-044907
Supersedes refnos: 09.41/21B, 09.41/21C, 09.41/21E

POOR ENGINE PERFORMANCE

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI09.41-P-044907 Version 1 (P-B-09.41/21E, December 2, 2008), Date of Issue: February 2, 2009

Mercedes-Benz:	199.376, as of VIN M000018
Design Group:	09.41 Charge air pipe/charge air cooler
Reason For Change:

Superceded Bulletin(s): P-B-09.41/21D, Date of Issue: August 26, 2008

COMPLAINT

Poor Engine Performance

CAUSE

If you receive customer reports in the above model vehicle of poor engine performance when the engine is hot, the cause may be due to the low temperature cooler circuits overheating due to the following causes. To resolve, perform the associated remedy.

Condition 1: Coolant loss through leaking low temperature cooler covers.

NOTE: As of February 28, 2006, Condition 1 of this DTB must not be performed on Model 199 - Serial Nos. M000018 to M000697, Covered under Service Campaign No. 2006020004 . Combining this DTB with the above referenced Campaign will result in a charge back of this DTB.

Condition 2: Coolant hose(s) kinked restricting water flow.

Condition 3: Low temperature cooling pumps loose or moving in mountings of engine.

Condition 4: Low temperature cooler pump(s) seized or seizing.

REMEDY

Remedy 1: Replace covers with new parts number A155 501 03 15 (left side) and A155 501 02 15 (right side) using two screws/cover (part number N000000 004068).

Remedy 2: Reposition or replace any kinked or deformed hoses.

Remedy 3: Replace locating straps with new heat resistant straps, part no. A345 997 75 90 as shown in Fig 1 and Fig 2 .

Remedy 4: Replace defective low temperature cooler pumps. Defective low temperature cooler pumps can be diagnosed with DAS; i.e., DAS will indicate which cylinder bank is overheating. Replace only the pump that feeds the overheating cylinder bank.

NOTE: The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on July 25, 2007. Please refer to Netstar -> Star TekInfo -> Star Time for the most current labor time allowance.

ATTACHMENTS

Fig 1: Locating Straps (1 Of 2)

Fig 2: Locating Straps (2 Of 2)

SYMPTOMS

Power generation / Engine performance / Engine management / No/poor output /

Power generation / Engine performance / Engine management / Poor acceleration /

PARTS

Part number	Designation	Qty	Non- EPC
A155 501 03 15	Low temperature cooler cover, left	1	X
A155 501 02 15	Low temperature cooler cover, right	1	X
N000000 0040 68	Low temperature cooler cover screw	2	X
Refer to EPC	Hose	1 each	X
A000 500 01 86	Low Temperature Cooler Pump	1	X
A345 997 75 90	Strap	4	X

WORK UNITS

Op. no.	Operation text	Time	Damage code	Note
02-4834	LOW TEMPERATURE COOLER COVER, R & R/REPLACE	0.6 hrs.	50101 04	Condition 1 Model Indicator: W1
09-0000	COOLANT HOSE, CHECK/ADJUST	0.5 hrs. *		Condition 2 (Use applicable Damage Code - 50136 38 / 50137 38 / 50138 38) Model Indicator: W1 * Maximum allowed time with a separate time punch. OR
20-7450	ENGINE COOLANT HOSE - ONE (SPECIFY), REPLACE	0.0 hrs.		Model Indicator: W1
09-6925	CIRCULATION PUMP - LOW TEMPERATURE WATER CIRCUIT, R & R	1.0 hrs.	50324 38	Condition 3 Model Indicator: W1
54-1011	SHORT TEST PERFORM	0.3 hrs.	50324 52	Condition 4 Model Indicator: W1
09-6925	CIRCULATION PUMP - LOW TEMPERATURE WATER CIRCUIT, R & R	1.0 hrs.		Model Indicator: W1
88-1102	FRONT BUMPER, R & R	0.0 hrs. *		Model Indicator: W1 * Maximum allowed time with a separate time punch.