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Pelican Technical Article:

Windshield Fluid Tank Replacement

Mike Holloway

Time:

30 minutes30 mins

Tab:

$170

Talent:

*

Tools:

Flat head screwdriver, 8mm nut driver

Applicable Models:

Mercedes-Benz R107 (1972-89)

Parts Required:

New windshield fluid tank

Hot Tip:

Cutting off old hoses optional only if replacement sought

Performance Gain:

Having a clean windshield

Complementary Modification:

Fluid pump replacement

Over time, the windshield fluid tank tends to turn yellow, become brittle and form micro fractures and sometimes leak. When the car warms up, the heat starts to attack the weakest point of the tank, eventually causing it to fail and the car starts leaking washer fluid. The good news is that the replacement tank is relatively inexpensive and can be changed in less than an hour.

Take a look around the tank. In some instances, you can instantly see it has been leaking. In others, you may only see a faint trace of fluid weeping/staining the crack or seam. It's important to tackle this problem as soon as possible.

There may be fluid in the tank. You may wish to drain the fluid from the tank prior to replacement. While the fluid is mostly water with some surfactants and low temperature flow aids it is still good practice not to allow spillage into the engine compartment.

The windshield fluid tank is located on the right side of the car.
Figure 1

The windshield fluid tank is located on the right side of the car. It is located in front of the coolant expansion tank (red arrow).

There may be fluid in the tank.
Figure 2

There may be fluid in the tank. There are different tools you can use to remove the majority of the fluid prior to removing the tank such as a turkey-baster or a hand-held fluid pump. A hand-held pump is used in thePicture. The suction tube is placed into the tank and the outlet tube drains into a bucket to collect the fluid.

Clip the cable tie from the hose to free the tank.
Figure 3

Clip the cable tie from the hose to free the tank.

Loosen and remove the 8mm bolt from tank.
Figure 4

Loosen and remove the 8mm bolt from tank.

The tank and hose located beneath the tank may contain fluid.
Figure 5

The tank and hose located beneath the tank may contain fluid. It is important that you tip the tank up as to not allow the fluid to spill into your engine compartment.

Once the tank is free from the car it will still be connected to the fed line and the electrical line for the fluid pump.
Figure 6

Once the tank is free from the car it will still be connected to the fed line and the electrical line for the fluid pump. The lines are easily removed by hand.

Once the tank and pump are completely free, the new tank is ready for installation.
Figure 7

Once the tank and pump are completely free, the new tank is ready for installation. It may also be a good time to clean off the pump and replace if needed.

The tank is now free from the car and can be replaced.
Figure 8

The tank is now free from the car and can be replaced. Installation is the reverse of removal.

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Page last updated: Fri 12/9/2016 02:25:25 AM