Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Remove/install spring control arm on front axle - AR33.15-P-0170RK
2013 Mercedes Benz SL550SECTION Remove/install spring control arm on front axle - AR33.15-P-0170RK
MODEL 231
| Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning from swallowing hydraulic fluid. | Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses. | AS00.00-Z-0013-01A | |
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. | AS00.00-Z-0010-01A | |
| Notes on self-locking nuts and bolts | AH00.00-N-0001-01A | ||
| Notes on repair work on suspension components | AH00.00-P-0100-01A | ||
| Notes on Active Body Control suspension | AH32.50-P-0001-01LF | ||
| Notes on Active Body Control suspension | AH32.50-P-0001-01N | ||
| Remove/install | |||
| 1 | Detach front wheel and tire assembly | ||
| AP40.10-P-4050EW | |||
| 2.1 | Release pressure in ABC system | Model 231.### ## up to 021273 with code 487 (Active Body Control (ABC)) |
AR32.50-P-0001-01N |
| *BA32.50-P-1001-02B | |||
| 2.2 | Release pressure in ABC system using diagnostic system | Model 231.### ## as of 021274 with code 487 (Active Body Control (ABC)) |
|
| AD00.00-P-2000-04A | |||
| AR32.50-P-0001-01LF | |||
| 3 | Remove middle and rear engine compartment paneling | AR61.20-P-1105RK | |
| 4 | Unscrew nut (9) and remove torsion bar linkage (7) from torsion bar pivot bushing (8) | Model 231 except code 487 (Active Body Control (ABC)) |
*BA32.20-P-1001-02H |
| 5 | Unscrew nut (1) and pull bolt (5) out of spring control arm (2) | *BA32.25-P-1002-04N | |
| 6 | Unscrew nut (12) and detach spring control arm (2) from steering knuckle (10) | The ball head must be counterheld and an impact wrench/driver must not be used. Otherwise, the ball head or steering knuckle (10) may be damaged. |
*BA33.20-P-1001-01S |
| 7 | Unscrew nut (3) and pull bolt (11) out of front axle carrier (4) | *BA33.20-P-1002-01S | |
| 8 | Remove spring control arm (2) downwards | ||
| Check | |||
| 9 | Check elastomer bearing in spring control arm (2) for damage and replace if necessary. | AR33.15-P-0170-02RK | |
| Fig 3 | |||
| Figure | |||
| 10 | Check seal bellows and ball joint in spring control arm (2) for damage and replace if necessary | ||
| 11 | Check torsion bar pivot bushing (8) in spring control arm (2) and replace if necessary | Model 231 except code 487 (Active Body Control (ABC)) |
AR32.20-P-0310RK |
| 12 | Install in the reverse order | ||
| 13 | Fill and bleed ABC system | Model 231 with code 487 (Active Body Control (ABC)) Fill up and vent the Active-Body-Control (ABC) system |
AR32.50-P-0021SX |
FRONT AXLE TORSION BAR
| Number | Designation | Model 231 | |
|---|---|---|---|
| BA32.20-P-1001-02H | Nut, torsion bar linkage to spring control arm | Nm | 130 |
SUSPENSION STRUTS
| Number | Designation | Model 231 | ||
|---|---|---|---|---|
| BA32.25-P-1002-04N | Nut, suspension strut for front axle to spring control arm | Stage 1 | Nm | 110 |
| Stage 2 | ∠° | 90 | ||
ACTIVE BODY CONTROL, LINES
| Number | Designation | Model 231 with code 487 | ||
|---|---|---|---|---|
| BA32.50-P-1001-02B | Bleed screw on soldered fitting in hydraulic line | M10 x 1 | Nm | 20 |
WHEEL CONTROL, HUB
| Number | Designation | Model 231 | |
|---|---|---|---|
| BA33.20-P-1001-01S | Nut, spring control arm to steering knuckle | Nm | 250 |
WHEEL CONTROL, HUB
| Number | Designation | Model 231 | ||
|---|---|---|---|---|
| BA33.20-P-1002-01S | Bolt, spring control arm to front axle carrier | Stage 1 | Nm | 100 |
| Stage 2 | ∠° | 180 | ||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.