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Pelican Technical Article:

Wiper Blade Replacement

Steve Vernon

Time:

15 minutes15 mins

Tab:

$12 to $60

Talent:

*

Applicable Models:

Mercedes-Benz W123 (1977-85)

Parts Required:

Wiper blades

Hot Tip:

Clean windshield before installing new blades

Performance Gain:

Better visibility in inclement weather

Complementary Modification:

Check windshield washer fluid

One often overlooked wear item on your car is the wiper blades. This is one of those things that can easily ruin your day if the weather suddenly turns bad. Replacement of the blade is very easy and should take no longer than 15 minutes.

If you live in a wetter climate, then you'll understand the importance of wiper blades that work well. If running the wipers just streaks the windshield, it's time for new blades.

Lower quality blades tend to dry out or crack quicker than quality ones. Good blades are more expensive, but they last longer and do a nicer job of keeping the water off the windshield.

There are three wiper blades on our 300TD wagon and all are changed in a similar manner. If someone has replaced the wiper arms then the procedures may be different. If your vehicle has different arms on it please share you experience with us below.

There are two windshield wipers on the front windshield; you are going to be lifting them off of the glass to change the blades and if you drop the metal arm back onto the windshield while doing this job you will probably break the glass, so use care and if you are worried put a piece of cardboard or a thick towel over the windshield while working.
Figure 1

There are two windshield wipers on the front windshield; you are going to be lifting them off of the glass to change the blades and if you drop the metal arm back onto the windshield while doing this job you will probably break the glass, so use care and if you are worried put a piece of cardboard or a thick towel over the windshield while working.

Pivot the wiper arm from the base until it stops in the up position approximately 90 degrees from the windshield.
Figure 2

Pivot the wiper arm from the base until it stops in the up position approximately 90 degrees from the windshield. Rotate the blade away from the arm and you will see a small tab (red arrow), press this tab and slide the blade down towards the windshield. If it is corroded use penetrating oil and wiggle it downward, the arms are not that strong and forcing it will just cause you to bend the wiper arm.

With the blade off you can see how the arm hooks on the end.
Figure 3

With the blade off you can see how the arm hooks on the end. Before installing the new blade clean up the arm and apply a little lubrication if needed (red arrow). Installation is the reverse of removal.

The rear wiper is replaced in the same manner and again you will be lifting it off the glass so use care and if you are worried put a piece of cardboard or a thick towel over the windshield while working.
Figure 4

The rear wiper is replaced in the same manner and again you will be lifting it off the glass so use care and if you are worried put a piece of cardboard or a thick towel over the windshield while working.

The rear blade is slightly different than the front blades as the release tab (red arrow) did not stick out but upward.
Figure 5

The rear blade is slightly different than the front blades as the release tab (red arrow) did not stick out but upward. All of the blades will have a release to them, you just need to look and find it. Slide the blade off and make sure to clean and lubricate the arm if needed. Installation is the reverse of removal.

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