Check all visible parts of vehicle underside for damage and fluid loss

AP00.20-P-0054G

Check all visible parts of vehicle underside for damage and fluid loss

04.03.2020

Model

253 (except 253.99)

Shown on model 253.925

1

Front center engine compartment paneling

3

Rear engine compartment paneling

2

Center engine compartment paneling

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

AH00.00-Z-0300-01A

Topical note

Notes on battery

AH54.10-P-0001-01A

Notes on evaluating leakages

AH00.00-N-0011-01A



Remove

1

Remove front center engine compartment lining (1), center engine compartment lining (2) and rear engine compartment lining (3).



AR61.20-P-1105LW



Check

2

Check visible systems, component parts, lines and hoses of the drive train on the underfloor for damage, correct routing, fluid loss, correct mounting and corrosion.

 If necessary, use commercially available devices/tools.
Swiveling inspection mirror with lighting, comparable to inspection mirror Hazet 1977-1

 Brake system,
Spring elements,
Shock absorber,
Suspension lines and sensors,
Steering,
Front axle,
Engine and mounted major assemblies,
Cooling system,
Heater and A/C system,
Body reinforcements,
Exhaust system,
Exhaust aftertreatment,
Actuator motors of exhaust gas flaps,
Heat shields,
Rear axle,
Rear axle shafts with boots,
Rear axle differential,
Fuel system.

If problems are determined,



rectify the problems.

 Subject to separate repair order.

3

Check visible systems, component parts, lines and hoses on the underfloor for damage, correct routing, fluid loss, correct mounting and corrosion.

Equipment-dependent.

 If necessary, use commercially available devices/tools.
Swiveling inspection mirror with lighting, comparable to inspection mirror Hazet 1977-1

 External noise sound generator,
Hybrid components,
Inerting system,
Stationary heater,
Manual transmission,
Clutch operation,
Automatic transmission,
Boots of front axle shafts (4MATIC),
Front axle transmission (4MATIC),
Transfer case (4MATIC).

If problems are determined,



rectify the problems.

 Subject to separate repair order.

4

Check underfloor and visible component parts on underfloor for damage, routing, mounting and corrosion.

 If necessary, use commercially available devices/tools.
Swiveling inspection mirror with lighting, comparable to inspection mirror Hazet 1977-1

 Wheel well trim
Underfloor paneling,
Underfloor.

If problems are determined,



rectify the problems.

 Subject to separate repair order.

5

Check visible body panels for corrosion and deformation.

 If necessary, use commercially available devices/tools.
Swiveling inspection mirror with lighting, comparable to inspection mirror Hazet 1977-1

 Wheel well body panels,
Front axle carrier,
Rear axle carrier,
Chassis steering arms,
Underfloor body panels,
Body reinforcements.

 Check rear axle carrier in area of welded-on mounting supports for thrust arm/tie rod for corrosion/perforation.

If problems are determined,



proceed in accordance with the country-specific regulations for mobility and body shell complaints.

 Subject to separate repair order.

6

Check underfloor paneling for damage from driving over obstacles or from bottoming damage.

 If necessary, use commercially available devices/tools.
Swiveling inspection mirror with lighting, comparable to inspection mirror Hazet 1977-1

If it is suspected that there is damage from driving over obstacles or bottoming,



Check steering for mechanical damages.

If the steering is mechanically damaged,



Replace steering for safety reasons.

 Subject to separate repair order.



Install

7

Install front center engine compartment lining (1), center engine compartment lining (2) and rear engine compartment lining (3).



AR61.20-P-1105LW