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

AP00.20-S-0054E

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

05.03.2020

Model

447

Model

448

1

Front engine compartment paneling

3

Underfloor paneling, right

2

Underfloor paneling, left

 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

Notes on evaluating leakages

AH00.00-N-0011-01A



Remove

1

Remove engine compartment lining (1) at front.



AR61.20-S-1105E

2

Remove underbody paneling (2 and 3) at left and right.



Model 447 with engine 622.8

AR61.30-S-1001EH



Model 447 with engine 651 with code MX0 (BlueEFFICIENCY package), Model 447 with engine 654.9

AR61.30-S-1001E



Check

3

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

 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,
Transmission,
Exhaust system,
Exhaust aftertreatment,
Heat shields,
Rear axle,
Rear axle shafts with boots,
Rear axle differential,
Fuel system.

If there is a problem,



rectify problem.

 After obtaining special order.

4

Check visible systems, components, lines and hoses on the underfloor for damage, correct routing, leaks, correct mounting and corrosion.

Equipment-dependent.

 Front axle shafts with boots (4MATIC),
Front axle transmission (4MATIC),
Stationary heater,
Transfer case (4MATIC).

If there is a problem,



rectify problem.

 After obtaining special order.

5

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

 Wheel well trim
Underfloor paneling,
Underfloor.

If there is a problem,



rectify problem.

 After obtaining special order.

6

Check visible body panels for corrosion and deformation.

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

If there is a problem,



rectify problem.

 After obtaining special order.

7

Check vehicle underside for evidence of driving over obstacles or damage caused by contact with the vehicle underside.

If it is suspected that obstacles have been driven over or bottoming damage has occurred,



check steering for mechanical damages.

If the steering is mechanically damaged,



Replace steering for safety reasons.

 After obtaining special order.



Install

8

Install engine compartment lining (1) at front.



AR61.20-S-1105E

 Reinstall engine compartment lining (1) only after completion of all maintenance operations.

9

Install underbody paneling (2 and 3) at left and right.



Model 447 with engine 622.8

AR61.30-S-1001EH



Model 447 with engine 651 with code MX0 (BlueEFFICIENCY package), Model 447 with engine 654.9

AR61.30-S-1001E