W177 hatchback
2019 onwardThe A 35 4MATIC hatchback. Mercedes-Benz shows two 12 V AGM batteries and a 48 V lithium-ion battery in the boot.
Mercedes-AMG - A-ClassWe test the A35's batteries where the car is parked and replace the 12 V AGM that has failed. Mercedes-Benz draws two 12 V AGM batteries on the A 35, one in the engine bay and one under the front cabin floor, plus a 48 V lithium-ion battery in the boot on cars built with the 48-volt system.
There is no earlier A 35 to tell apart. The model has only ever been built on the 177 series, as a hatchback or as a saloon.
The A 35 4MATIC hatchback. Mercedes-Benz shows two 12 V AGM batteries and a 48 V lithium-ion battery in the boot.
The A 35 4MATIC saloon keeps the same three-battery layout, its 48 V unit under its own cover in the boot.
Call or WhatsApp with your location and car.
Get the price before anyone sets off.
A technician arrives in about 25 minutes.
Free test, new battery fitted, old one recycled.
We test the two 12 V batteries separately, because a good result on one says nothing about the other.
Under its own cover at the front of the car. It is load tested before anything is recommended.
The second 12 V battery sits below the front of the cabin, out of sight, and gets its own test.
Fitted to A 35s with the 48-volt system. Mercedes-Benz disconnects it separately from the 12 V batteries.
We test a long-parked A 35 before replacing anything, and the W177 owner's manual describes how to avoid the problem in the first place. On cars that offer it, Standby Mode is switched on in MBUX under the Vehicle settings, with the engine off and the ignition on. It preserves the starter battery and displays how long the car can stand.
Online services pause while it is active. Leave the car past the displayed time and the manual says a reliable start cannot be guaranteed. If the display reports that the battery charge is insufficient for Standby Mode, the battery has to be charged first.
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The W177 manual gives three ways to protect the battery over a long stay. Pick one.
Turn on Standby Mode in MBUX, with the engine off and the ignition on
Or keep the car on a battery charger approved by Mercedes-Benz
Or have the 12 V battery disconnected by a specialist
Read the standing time the display shows before you fly out
Charge first if the display says there is not enough for Standby Mode
Expect connected services to stay offline until the ignition goes on again

Both 12 V AGMs tested, plus the charging voltage with the engine running.
Engine bay or cabin floor, depending on which battery the test points to.
The new AGM goes in with the old battery's vent hose and covers transferred across.
The AMG engine started and the display read for any battery message before we leave.

Mercedes-Benz shows two 12 V AGM batteries on the A35, one in the engine bay and one under the front cabin floor. Cars built with the 48-volt system add a 48 V lithium-ion battery under a cover in the boot. Hatchback and saloon share the same layout, so the test covers each of them.
The 12 V AGM battery that fails the test. The two 12 V batteries are tested one by one, so only the weak one is replaced. Replacement starts from AED 175 fitted, and the new AGM is covered by our 1-year warranty.
A setting the W177 owner's manual describes for long periods parked, on cars that have it. With the engine off and the ignition on, you switch it on in MBUX under Vehicle. It preserves the starter battery, pauses online services and shows how long the car can stand before a reliable start is no longer guaranteed.
The W177 manual asks for a charger tested and approved by Mercedes-Benz, with a maximum charging voltage of 14.8 V. Charging connects at the jump-start point in the engine bay, not at the battery. A charger without a voltage limit can damage the battery or the car's electronics, the manual warns.
No. The A35 has only been built on the 177 series, from 2019, as a W177 hatchback or a V177 saloon. There is no W176 version to tell apart, which makes the battery layout the same whichever A35 you own. We still read the label before fitting.
Not Your Model?
We fit batteries across the whole Mercedes-Benz range, and the marque page lists every model we cover.
Battery Change Dubai tests both 12 V batteries where the car stands and replaces only the one that has failed, any time of day or night.
More than 20 mobile vans work across Dubai. For a battery call, a technician reaches you in about 25 minutes. The vans cover Al Karama, Dubai South, Business Bay, Downtown Dubai, office car parks, villa communities and highways.