Set the Wiper Service Position

To change the wiper blades or lift them off the glass in winter on a Mercedes-Benz GLC (X253, 2015–2022), the arms need to be in their service (vertical) position. Park them normally and they sit under the bonnet edge out of reach — here’s how to raise them.

The service position on the GLC — often called the wash or vertical position — is a mode that stands the wiper arms upright, high on the windscreen, so you can get at the blades. It’s the position you want in a handful of routine situations: fitting fresh blades when the old rubber starts to streak or chatter, lifting the arms off the glass before an overnight frost so they don’t freeze down and tear when you next switch on, and clearing leaves or grit out of the scuttle grille below the screen. It’s completely normal behaviour, not a fault — the GLC parks its arms low on purpose. On this car the arms are raised with a specific stalk action while the ignition is on, described in full below.

Why You Need the Service Position

The GLC parks its wiper arms right down at the base of the windscreen, tucked below the trailing edge of the bonnet and the plastic scuttle cover. That keeps them out of sight and out of the airflow, but it leaves no clearance to swing an arm up from rest. Lever one up cold and you’re working it against the bonnet lip — enough to bend the arm, disturb the splined fitting, or chip the paint. Raising the arms into the vertical service position first gives them their full travel and a clean gap to work in, so nothing is forced.

Getting Ready

• Check the bonnet is fully closed and latched — the arms rise into the space it would otherwise fill.
• Have the ignition on, as the stalk method below needs it live to raise the arms.
• If the blades are frozen to the glass, free them gently first so the motor isn’t dragging iced-on rubber up the screen.
• Have your new blades ready and unpacked before you lift an arm.
• Work one arm at a time, keeping a hand on whichever arm is standing up.

How to Set the Wiper Service Position

1. Make sure the bonnet is closed.
2. With the ignition on, briefly press the wash button on the end of the wiper stalk (about a second) — on the GLC this raises the wipers into the upright service/wash position.
3. The arms rise and stop vertical. Lift them away from the glass to change blades or clear snow.

Some cars also offer a wiper service position toggle in the vehicle menu.

Returning Them to Park

Fold the arms back onto the glass, then switch the wipers on briefly (or cycle the ignition) — they return to the normal parked position. Always do this before driving off, so the arms aren’t left standing and don’t slam down against the glass at speed.

If the Wipers Won’t Lift

• Hold the stalk button a moment longer — a quick tap just triggers a single wash/wipe instead of the service position.
• Check the menu for the service-position option if the stalk method doesn’t raise them.
• The ignition isn’t on — the wash-button method needs the car live; switch it on and retry.
• The bonnet is open or ajar — latch it fully, then try again.
• The blades are iced to the glass — free them first so the motor can lift the arms.

Changing the Blades and What to Expect

With an arm standing vertical, keep a hand on it — the arms are spring-loaded and will snap back onto the glass if they slip, which can crack the screen. The GLC uses a common clip-type fitting, where the blade locks onto a hook or bayonet on the arm; press the release catch, slide the old blade off, and clip the new one on until it clicks home. Confirm it’s seated, then lower the arm slowly rather than letting it fall. Do the same on the other side, then return the wipers to park.

Frequently Asked Questions

How do I put the Mercedes GLC wipers in service position?

With the ignition on, hold the wash button on the end of the wiper stalk briefly. The arms rise to vertical and hold there so you can reach the blades. Some cars also list the option in the on-screen menu.

Why won’t my wipers move up to be changed?

They park under the bonnet lip on purpose, so there’s no room to lift them from rest. Use the service position to raise them cleanly rather than forcing an arm up by hand.

How do I get the GLC wipers back down?

Fold the arms flat onto the glass, then switch the wipers on briefly or cycle the ignition. They sweep back down to their normal parked position.

Do I need any tools?

No — it’s done from the wiper stalk (or the menu on some cars). You’ll only need the replacement blades themselves when it’s time to swap them.

Can I just lift the arms at park instead?

Better not to. From park the arms sit under the bonnet edge with no clearance, so lifting them cold risks bending an arm or marking the paint. The vertical service position gives full, safe travel.

Does raising the wipers reset anything?

No. It only moves the arms; it doesn’t change any settings, service data or warning lights. Once you return the wipers to park, the car is exactly as it was.

Doing other jobs after a battery change? See our GLC battery guide. For warning lights, look up the code on autodtcs.com.