Steering Complaints (46.20/30C)

Publication date: 2006-05-22
Reference number: 46.20/30C

STEERING COMPLAINTS

TECHNICAL SERVICE BULLETIN

Reference Number(s): T-B-46.20/30C, Date of Issue: May 22, 2006

MERCEDES-BENZ:	Models 163.154/157/172/174/175
GROUP:	46 - Steering

Superceded Bulletin(s): T-B-46.20/30B, Date of Issue: April 21, 2006

SUBJECT

Models 163.154/157/172/174/175

Steering Complaints

SERVICE INFORMATION

If you receive customer reports in the above model vehicles of any of the below power steering system conditions, please perform the associated remedy.

NOTE: Do not replace steering gear as a remedy for any of the below conditions.

Condition 1: Steering leaking at steering gear

Cause: Steering gear internal pipes may be oxidized or corroded.

Remedy: Remove steering gear, refer to WIS document AR46.20-P-0600GH. Replace oxidized or corroded steering gear internal pipes, refer to WIS document AR46.20-P-3501GH.

Condition 2: Steering noisy when turning.

Cause: Steering shaft dust cap and/or clamp for steering gear bellows may be damaged.

Remedy: Remove steering gear, refer to WIS document AR46.20-P-0600GH. Replace steering shaft dust cap if damaged, refer to WIS document AR46.20-P-0004GH. Replace clamp for steering gear bellows if damaged.

Condition 3: Steering gear leaking at internal pipe fittings.

Cause: Seal at internal pipe fittings may be insufficient.

Remedy: Remove steering gear, refer to WIS document AR46.20-P-0600GH. Remove internal pipes, refer to WIS document AR46.20-P-3501GH. Replace o-rings at internal pipe fittings if necessary.

Condition 4 (Valid for 163.174 Only): Steering heavy or stiff during low speed turns.

Cause: Parametric valve may be malfunctioning.

Remedy: Remove steering gear, refer to WIS document AR46.20-P-0600GH. Replace parametric valve (PML), refer to WIS document AR46.50-P-6000GH.

Condition 5: Excessive play in steering wheel and/or noisy when steering.

Cause: Inner tie rod may be damaged.

Remedy: Replace inner tie rod, refer to WIS document AR46.40-P-0201GH.

Condition 6: Excessive play in steering wheel when steering.

Cause: Steering wheel play may not be correctly adjusted between thrust piece assembly and steering rack.

Remedy: Remove steering gear, refer to WIS document AR46.20-P-0600GH. Set play between thrust piece assembly and steering rack, refer to WIS document AR46.20-P-0601GH.

Condition 7: Steering leaking and noisy.

Cause: Steering gear rubber bellows may be torn or damaged.

Remedy: Remove steering gear, refer to WIS document AR46.20-P-0600GH. Replace steering gear rubber bellows, refer to WIS document AR46.40-P-0400GH.

Condition 8: Leaking power steering hose connections at power steering pump and steering gear. Refer to Fig 1, connections at 4 and 5 O-rings.

Cause: O-ring(s) at connections 4 and/or 5 may be damaged.

Remedy 8a:

Clean area where power steering hoses (Fig 1, 7 and 8) connect to power steering pump and steering gear.
Start engine, then visually inspect power steering hose connections at power steering rack (Fig 1, 9) and pump (Fig 1, 6) for leakage.
NOTE: Two sealing rings per connection (Fig 1, 4) are installed as of VIN A289565.
Shut-off engine.
Disconnect power steering hose(s) at leaky connection(s) and replace only leaking O-ring(s).
Reassemble in reverse order (refer to torque specifications below).

Remedy 8b: Bleed power steering system, refer to WIS Document AR46.30-P-0010P.

Fig 1: Power Steering Hose Connections At Power Steering Pump And Steering Gear (Shown On Power Steering Rack (9) Up To VIN A289564)

TORQUE SPECIFICATIONS AT STEERING RACK

Designation		Model 163 up to VIN A289559, X754619	Model 163 as of VIN A289560, X754620
Return hose (8, Fig 1) connection fitting (threaded joint) to power steering rack	Nm	15	15
High-pressure expansion hose (7) connection fitting (threaded joint) to power steering rack	Nm	15	15

TORQUE SPECIFICATIONS AT POWER STEERING PUMP

Designation			Model 163
High-pressure expansion hose (7, Fig 1) connection fitting to power steering pump (6)	M16x1.5	Nm	45

PARTS INFORMATION

Qty.

Part Name

Part Number

Parts for Condition 1

Internal pipe repair kit (All 163 as of VIN A289560)

A163 460 61 24 ⁽¹⁾

Internal pipe repair kit (Model 163.174 only up to VIN A289559)

A163 460 62 24 ⁽¹⁾

Internal pipe repair kit (All 163 except 163.174 up to VIN A289559)

A163 460 63 24 ⁽¹⁾

Parts for Condition 2

Dust cap repair kit

A163 462 00 57 ⁽¹⁾

Parts for Condition 2

Dust cap repair kit

A163 462 00 57 ⁽¹⁾

Parts for Condition 3

O-ring repair kit (up to VIN A289559)

A163 460 02 02 ⁽¹⁾

O-ring repair kit (as of VIN A289560)

A163 460 03 02 ⁽¹⁾

Parts for Condition 4

Parametric valve

A163 460 00 84 ⁽¹⁾

Parts for Condition 5

Inner tie rod repair kit

A163 460 00 05 ⁽¹⁾

Parts for Condition 6

Parts not required

Parts for Condition 7

Steering gear bellows repair kit

A163 460 01 96 ⁽¹⁾

Parts for Condition 8

Sealing ring, high pressure expansion hose connection at steering gear (as of VIN A289565)

N007603 018101 ⁽¹⁾

Sealing ring, return line connection at steering gear (as of VIN A289565)

N007603 018101 ⁽¹⁾

O-ring, high pressure expansion hose connection at steering gear (up to VIN A289564)

A025 997 73 48 ⁽¹⁾

O-ring, return line connection at steering gear (up to VIN A289564)

A025 997 74 48 ⁽¹⁾

O-ring, high pressure expansion hose connection at power steering pump

A025 997 75 48 ⁽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: Power steering gear box/steering rack, R & R (46-3400)

Line - (one) control head to steering gear housing, seal/replace if required (steering rack removed) (46-6000)

Line - (both) control head to steering gear housing, seal/replace if required (steering rack removed) (46-6001)

Protective cap - input shaft on steering gear (steering removed), R & R, replace if necessary (46-7219)

Speed sensitive power steering p-valve, repl. (power steering gear box removed) (46-5178)

Tie rods - (all), R & R/replace as required (46-7001)

Tie rod - l/side, R & R/replace if required (46-7004)

Tie rod - r/side, R & R/replace if required (46-7005)

Play between thrust piece and rack (steering removed), check (46-4350)

Thrust piece and rack (steering removed), adjust play (46-4355)

Tie rod/drag link joint seal/boot - one, replace (46-7200)

Check for leaks (46-0000)

O-ring(s), replace (46-0000)

WARRANTY INFORMATION

Damage Code	Operation Number	Time (hrs.)	Model Indicator (s)
Condition 1
46482 47	46 3400	4.7 hrs.	K1, K2, K3, K4, K5
	46 6000	0.4 hrs.	K1, K2, K3, K4, K5
	OR
	46 6001	0.5 hrs.	K1, K2, K3, K4, K5
Condition 2
46483 36	46 3400	4.7 hrs.	K1, K2, K3, K4, K5
46483 36	46 7219	0.7 hrs.	K1, K2, K3, K4, K5
Condition 3
46031 04	46 3400	4.7 hrs.	K1, K2, K3, K4, K5
	46 6000	0.4 hrs.	K1, K2, K3, K4, K5
	OR
	46 6001	0.5 hrs.	K1, K2, K3, K4, K5
Condition 4
46438 73	46 3400	4.7 hrs.	K3
46438 73	46 5178	0.2 hrs.	K3
Condition 5
46488 17	46 7001	0.8 hrs.	K1, K2, K3, K4, K5
	OR
	46 7004	0.6 hrs.	K1, K2, K3, K4, K5
	OR
	46 7005	0.6 hrs.	K1, K2, K3, K4, K5
Condition 6
46481 17	46 4350	0.8 hrs.	K1, K2, K3, K4, K5
46481 17	46 4355	0.7 hrs.	K1, K2, K3, K4, K5
Condition 7
46486 07	46 7200	0.7 hrs.	K1, K2, K3, K4, K5
Condition 8
46035 04 and / or 46036 04	46 0000	0.1 hrs.	K1, K2, K3, K4, K5
46035 04 and / or 46036 04	46 0000	0.3 hrs.	K1, K2, K3, K4, K5
46037 04	46 0000	0.1 hrs.	K1, K2, K3, K4, K5
46037 04	46 0000	0.2 hrs.	K1, K2, K3, K4, K5

NOTE: Front toe adjustment only valid for Condition 5.

NOTE: If more than one condition is repaired during the same service visit, Op. Code 46-3400 (Power steering gear box/steering rack, R & R) can only be claimed once.

NOTE: Condition 1 includes all steps and parts in Condition 3.