賓士原廠技術通報-W204/C300

- No power flow from automatic transmission 722.9 after replacing the hydraulic controller unit -

Topic number	GI27.35-P-020442
Version	2
Design group	27.35 Valve body
Date	03-21-2007
Validity	All models with automatic transmission 722.9
Reason for change	Complaint and validity revised

Complaint

After replacing the hydraulic controller unit on automatic transmission 722.9 (7G-TRONIC), no gear can be engaged in transmission mode "S" and there is no power flow from the transmission. In transmission mode "C" the vehicle starts off as usual (vehicles with gasoline engines only).

Cause

When installing the new hydraulic unit, the supply pipe for multidisk brake B3 was not installed correctly.

File	Designation
Versorgungsrohr.jpg	Supply pipe for multidisk brake B3

Remedy

Remove hydraulic controller unit as described in AR 27.19-P-0200w.

Before reinstalling, install supply pipe as described in AR 27.19-P-0200w, step 6. See also the pictures in the annex.

File	Designation
Versorgungsrohr montieren1.jpg	Insert supply pipe into transmission housing before installing the hydraulic unit.
Versorgungsrohr montieren2.jpg	Insert supply pipe into transmission housing before installing the hydraulic unit.

WIS references

Document number	Title	Note	Allocation
AR27.19-P-0200w	WIS reference		Remedy

Symptoms

Symptom

Power transmission / Power transmission, function / No power flow

Power transmission / Automatic transmission / Automatic transmission - function / General

Power transmission / Automatic transmission / Automatic transmission - function / Engaging process

Power transmission / Automatic transmission / Automatic transmission - function / No power flow

Parts

Part number	ES1	ES2	Designation	Quantity	Note	EPC	Non-EPC
A2202770047			Oil guide pipe	1	Only order if the old supply pipe was damaged	X