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Pelican Technical Article:

Under Body Tray Removal

Steve Vernon

Time:

30 minutes30 mins

Tab:

$0 to $60

Talent:

*

Tools:

8mm Socket

Applicable Models:

Mercedes-Benz W124 (1990-95)

Parts Required:

New tray

Hot Tip:

Repair clips

Performance Gain:

Proper air flow

Complementary Modification:

Flush cooling system

The under body trays on most modern cars are used not only to protect the systems from road debris and weather but to also manage the air flow under and around the vehicle. The W124 is no exception even though it only has one tray. You will need to remove the engine tray to get access to the underside of the engine and suspension.

Begin by safely jacking up and supporting your car.
Figure 1

Begin by safely jacking up and supporting your car. Consult our article on lifting your vehicle safely. Always wear eye protection anytime you work under your vehicle. A great many of these cars have had the engine tray removed over the years and not replaced. If your tray is missing, you should give serious thought to replacing it. The tray is held in place by six 8mm screws with large washers (red arrows--some cars may only have 4 screws). Note: Our project car had an empty cardboard oil box lying flat between the tray and the engine (yellow arrow). NEVER do this! It is dangerous. If you cannot fix the leak place a drip tray under where you park but never place anything between the hot engine, moving components and the under tray.

Use an 8mm socket and remove the screw and washer.
Figure 2

Use an 8mm socket and remove the screw and washer. These have a tendency to be covered in oil on older cars, so give them a quick wipe before you start. Loosen all the screws first and then while supporting the tray with your free hand, hand remove the final screws. Watch for dripping oil and debris when bringing the tray down.

The clips (red arrow) that the trays screws sit in can become loose and/or fall out.
Figure 3

The clips (red arrow) that the trays screws sit in can become loose and/or fall out.

If the clips are loose or have fallen out you can simply use a flathead screwdriver to re-expand the clip (red arrow) and then tap them back into place.
Figure 4

If the clips are loose or have fallen out you can simply use a flathead screwdriver to re-expand the clip (red arrow) and then tap them back into place. Installation is the reverse of removal.

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Comments and Suggestions:
Colin. Comments: worked it out there is a tube runs across behind the radiator guard and curves up either end to bolt onto the sub frame its built like the belly plate on a dozer.
May 26, 2015
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
Colin. Comments: , have two of these cars one with build date april 90 and the other may 90 the later of the two has a fibre glass tray and is held on as above, how ever the earlier one has a steel plate, there are two bolts at the rear but I cant fin the front two.
May 25, 2015
  Followup from the Pelican Staff: Check down in front of the radiator, near the subframe. - Nick at Pelican Parts  
mytrustymb Comments: Mine uses 4.
May 12, 2015
  Followup from the Pelican Staff: Thanks, I am having the info double checked. - Nick at Pelican Parts  
mytrustymb Comments: Figure 1 shows 6 red arrows indicating each screw and washer.
But the narrative says the tray uses 4, and my W124 uses 4. Am I missing 2?
May 6, 2015
  Followup from the Pelican Staff: I will check with our tech writer.

Can you get yours off with the just the two? - Nick at Pelican Parts
 

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