🔧 GLA - Front Wiper Blade Replacement

You’ll put the wiper arms into a safe “service position,” remove the old blades, and snap on new ones. This matters because worn blades reduce visibility and can scratch the windshield.

Difficulty Level: Beginner | Estimated Time: 0.25-0.5 hours

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⚠️ Safety & Precautions

• ⚠️ Keep the ignition OFF when your fingers are near the wiper linkage.
• ⚠️ Don’t let the wiper arm “snap” onto the glass—always rest it on a towel.
• ⚠️ Use wiper service position so the hood edge doesn’t interfere.
• ⚠️ Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Microfiber towel
• Plastic trim tool
• Step stool

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front wiper blades (OE-style, correct lengths for your GLA) - Qty: 2
• Windshield washer fluid - Qty: 1

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📋 Before You Begin

• Park on level ground and turn the ignition OFF.
• Have a microfiber towel ready to protect the windshield.
• Service position prevents hood interference.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Put the wipers into “service position”

• Use the start/stop button to turn ignition ON (do not start the engine).
• Use the start/stop button again to turn ignition OFF.
• Within about 15 seconds, use the wiper stalk to command a single wipe (press/hold to the “mist” position). The wiper arms should move up and stop where you can safely lift them.
• If they don’t stop up, repeat the ON → OFF → single-wipe sequence.

Step 2: Protect the windshield

• Place a microfiber towel on the windshield directly under the wiper arm area.
• This is your “cushion” in case the arm springs back.

Step 3: Lift the driver-side wiper arm

• Carefully raise the wiper arm off the glass until it stays up on its hinge.
• Use a step stool if you need better reach and control.

Step 4: Remove the old wiper blade

• At the joint where the blade connects to the arm, use a plastic trim tool to press the small locking tab (a tab is a small catch that holds parts together).
• While holding the tab, slide the wiper blade down and away from the arm hook/connector until it releases.
• If it’s tight, wiggle gently while keeping the tab pressed—don’t twist hard.

Step 5: Install the new driver-side blade

• Align the new blade’s connector with the wiper arm end.
• Slide it into place until you hear/feel a firm “click.”
• Gently tug on the blade to confirm it’s locked.

Step 6: Repeat on the passenger-side

• Use the same process: lift arm, press tab with the plastic trim tool, slide old blade off, slide new blade on until it clicks.
• Passenger blade is usually a different length.

Step 7: Lower the wiper arms safely

• Lower each wiper arm back onto the windshield slowly and gently.
• Remove the microfiber towel.

Step 8: Exit service position

• Use the start/stop button to turn ignition ON.
• Use the wiper stalk to run the wipers once, then turn them OFF so they park normally.

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✅ After Repair

• Top off washer fluid if needed.
• Test the wipers with washer spray and confirm there’s no skipping, streaking, or chatter.
• If you get streaks right away, clean the windshield with glass cleaner and a fresh towel.

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💰 DIY vs Shop Cost

Shop Cost: $60-$140 (parts + labor)

DIY Cost: $25-$70 (parts only)

You Save: $35-$70 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.5 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

Assumption: Your GLA uses the common Mercedes wiper “service position” (ON → OFF → single-wipe within ~15 seconds).