NHTSA ID Number: 10167502
Manufacturer Communication Number: LI32.34-P-058736
TSB/Document Date: 2019-11-12
Summary
ACTIVE CURVE SYSTEM malfunction in instrument cluster in combination with the following fault codes in the ACS control unit: P100000: The oil pressure at the front axle is too low. (Veh. up to approx. 7/2012) P100200: The oil pressure at the rear axle is too low. (Veh. up to approx. 7/2012) P1C9C00: The oil pressure at the front axle is too low. (Current veh.) P1C9E00: The oil pressure at the rear axle is too low. (Current veh.) In addition, the following complaints may occur depending on symptoms: Gushing/flow noises from the front or rear axle area when cornering. Oil leaking via the ACS reservoir.
ACTIVE CURVE SYSTEM malfunction in instrument cluster.
Topic number
LI32.34-P-058736
Version
1
Design group
32.34 Roll control (WR)
Date
03-21-2014
Validity
MODEL 166 with AIRMATIC (code 489) and ACS (ACTIVE CURVE SYSTEM, code 468)
Reason for change
Reason for block
Complaint:
ACTIVE CURVE SYSTEM malfunction in instrument cluster in combination with the following fault codes in the ACS
control unit:
P100000: The oil pressure at the front axle is too low. (Veh. up to approx. 7/2012)
P100200: The oil pressure at the rear axle is too low. (Veh. up to approx. 7/2012)
P1C9C00: The oil pressure at the front axle is too low. (Current veh.)
P1C9E00: The oil pressure at the rear axle is too low. (Current veh.)
In addition, the following complaints may occur depending on symptoms:
Gushing/flow noises from the front or rear axle area when cornering.
Oil leaking via the ACS reservoir.
Cause:
Residual air in the system.
As a result, a fault code is logged and the message appears in the instrument cluster.
Remedy:
1. Check intake line for tight seating at oil reservoir and at pump (it should not rotate; replace if necessary)
2. Fill oil reservoir up to upper line of 60° marking
3. Start engine and observe fill level
4. If the fill level drops, switch off engine and correct oil level, multiple times if necessary, until it can no longer be detected to drop.
5. If the fill level is stable, run engine at idle until there are no more bubbles in the oil reservoir
6. When the oil reservoir is free of bubbles, start the bleeding routine.
7. If there is severe foaming in the oil reservoir, abort the routine and top up the oil again, then run the engine until the
reservoir is free of bubbles.
8. Restart the bleeding routine, observing the fill level and watching for foaming.
9. When the foaming stops, the high-pressure test can be started.
10. If the test is passed, again check that the fill level in the reservoir is at the correct level; correct if necessary.
Symptoms
Chassis/suspension / Chassis, noises / Whistling
Chassis/suspension / Suspension characteristic / Oil ejection
Chassis/suspension / Suspension/Dampening / Roll control / Nonfunctional
03-21-2014 4:12 PM
© Copyright Daimler AG
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Control unit/fault code
Control unit
Fault code
Fault text
Roll control - Roll control (N51/ P100000
6) (ARS166)
The oil pressure at the front axle is too low.
Roll control - Roll control (N51/ P100200
6) (ARS166)
The oil pressure at the rear axle is too low.
Roll control - Roll control (N51/ P1C9C00
6) (ARS166)
The oil pressure at the front axle is too low. _
Roll control - Roll control (N51/ P1C9E00
6) (ARS166)
The oil pressure at the rear axle is too low. _
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC Other
make
part
A 166 320 08 55
Intake hose
1
Valid for M276
X
A 001 989 24 03
Multigrade oil
1
As required, also known as
Pentosin.
X
A 166 320 03 55
Intake hose
1
Valid for M278 / M157
X
A 166 320 10 55
Intake hose
1
Valid for OM642
X
Work units
Op. no.
Operation text
Time
Damage
code
32-6981
REPLACE LINE FOR ACTIVE ROLL
STABILIZATION, LOCATION:.....
32604 04
32-6983
CHECK OIL LEVEL OF ACTIVE ROLL
STABILIZATION, CORRECT (AFTER
CHECK)
32707 S1
32-6990
FILL/BLEED ACTIVE ROLL STABILIZATION (AFTER CHECK)
32707 S1
Note
WIS-References
Document number
Title
Note
Allocation
AR32.22-P-0021GQ
Fill and bleed Active Roll
Stabilization
Remedy
BB00.40-P-0345-00A
Hydraulic fluids (Specification 345.0)
Remedy
Validity
Vehicle
Engine
GL (166)
*
*
03-21-2014 4:12 PM
© Copyright Daimler AG
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M (166)
*
*
Vehicle
Engine
166.003
651.960
722.908
166.004
651.960
722.908
166.023
642.826
722.903
166.023
642.826
725.031
166.024
642.826
722.903
166.024
642.826
725.031
166.055
276.955
722.906
166.056
276.821
722.904
166.056
276.925
722.904
166.057
276.955
722.906
166.058
276.955
722.906
166.059
276.821
722.904
166.062
276.821
722.904
166.073
278.928
722.909
166.073
278.928
725.031
166.073
278.928
725.032
166.074
157.982
722.905
166.074
157.982
722.931
166.823
642.826
722.903
166.823
642.826
725.031
166.824
642.826
722.903
166.824
642.826
725.031
166.856
276.821
722.904
166.864
276.821
722.904
166.865
276.821
722.904
166.872
278.928
722.909
166.872
278.928
725.031
166.872
278.928
725.032
166.872
278.928
725.033
166.873
278.928
722.909
166.873
278.928
725.031
166.873
278.928
725.032
166.873
278.928
725.033
166.874
157.982
722.905
166.874
157.982
722.931
Full model designation breakdown
03-21-2014 4:12 PM
© Copyright Daimler AG
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- 6X better wear protection on critical engine parts than...
- 1.3X better sludge protection than industry standards*
- 3X Stronger against viscosity breakdown than leading full...
- Protection for 10,000 miles between oil changes
- Meets or exceeds the following specifications: API SP/SN...
- Formulated for engines with 75,000 miles or more, Valvoline...
- Delivers 20% better wear protection and 15% better sludge...
- Extra detergents safeguard against friction, corrosion and...
- Advanced friction-fighting additives help maximize...
- Provides performance benefits for high mileage, new and...
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TSB/Document ID: LI32.34-P-058736
Replacement Service Bulletin Number:
MFR Communication Date: 2014-03-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SUSPENSION
MFR Component System:
MFR Component Subsystem:
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