Mercedes-Benz - GLCMercedes GLC300 Battery Replacement in Dubai
The GLC300 swapped its battery from one end of the car to the other between generations. On the X253 the 12V AGM is under the bonnet on the passenger side; on the X254 it moved to the rear and a lithium 48V battery for the mild-hybrid system took the front spot under the cabin air filter. We know both layouts, check the X253's battery tray while we are there, and test, fit and register the correct battery at your location in Dubai.
Mercedes GLC300 at a Glance
- Battery type
- AGM
- Start-stop on both generations.
- Capacity
- 80 - 92Ah
- H7 or H8 by equipment; confirmed from the VIN.
- X253 main battery
- Engine bay, passenger side
- Under the cover in front of the windscreen.
- X253 auxiliary
- Passenger footwell
- A battery or a capacitor by build date.
- X254 main battery
- Rear of the car
- 48V lithium unit at the front, under the cabin air filter.
- Coding
- Required
- Registered to the battery management system on fitting.
Mercedes GLC300 by Generation
The name stayed the same, the electrical system did not. Find the years your car was built in and the differences that matter.
The 2.0 litre M274 at 241hp, then the M264 from the 2019 facelift. 12V AGM in the engine bay under the passenger-side cover, auxiliary unit under the footwell carpet. The battery tray on this generation is worth inspecting.
The 2.0 litre M254 with an integrated starter generator and 48V mild-hybrid system. The 12V AGM moves to the rear of the car; the lithium 48V battery sits at the front under the cabin air filter. Charging of both runs through the 12V.
Front or Back? The GLC300 Battery Map
Two generations, opposite ends. Check the table before you lift a cover.
| Item | X253 (2015-2022) | X254 (2022 on) |
|---|---|---|
| 12V main battery | Engine bay, passenger side, under the windscreen cover | Rear of the car |
| Auxiliary unit | Passenger footwell, under the carpet | Capacitor-type unit, front of cabin |
| 48V lithium battery | Not fitted on most cars | Front, under the cabin air filter |
| Starter | Conventional | Integrated starter generator |
| Battery tray | Reported weak point, inspected | Redesigned |
| Coding after replacement | Yes | Yes |
We confirm the generation from the VIN before the visit. Some facelift X253 markets carried a 48V system; the technician checks on arrival.
A Cracked Tray Is a Battery Problem Too
The tray that holds the X253's battery is a plastic moulding, and on the 2015 to 2023 C-Class, E-Class and GLC it is reported to crack with age and heat. In Dubai it has plenty of both. A cracked tray lets the battery shift under braking and over speed bumps, and a battery that moves is a battery that dies early, because vibration fractures the plates inside it.
It also stresses the hold-down and the terminals, and an intermittent terminal connection on a modern Mercedes produces a stream of electrical faults that look nothing like a battery problem. Our technicians check the tray, the clamp and the terminal seating every time an X253 battery is replaced, and say so if the tray needs attention.
On the X254 the tray moved to the back of the car with the battery, and the design changed. What that generation adds instead is the 48V system: a lithium battery under the cabin air filter at the front, charged through the 12V by a DC converter. A weak 12V on an X254 therefore affects the 48V side as well, which is one more reason to keep it healthy.
What Gets Done on a GLC300
The battery, the tray and the systems around it, at your location, on either generation.
- Goes to the Right EndBonnet on an X253, rear of the car on an X254. Known from the VIN before the technician leaves, so nothing is dismantled that does not need to be.
- Tests Before QuotingMain battery under cranking load, the auxiliary or capacitor unit, alternator or starter generator output, and the 48V status on an X254.
- Inspects the X253 TrayCracks, a loose clamp or a shifted battery are found and reported while the old battery is out, not after the new one has been damaged by them.
- Fits and RegistersThe correct AGM for your generation, seated and clamped, coded to the car, warnings cleared, start-stop confirmed.
GLC300 Symptoms That Call for a Test
An SUV that does the school run and the mall is exactly the use that wears a battery out unnoticed.
- Start-stop that has stopped working, the first sign on either generation
- Slow cranking after the car has sat in the sun through the afternoon
- An auxiliary battery malfunction message, which points at the footwell unit on an X253
- Reduced mild-hybrid boost or a related message on an X254
- Electrical oddities on an X253 that come and go with bumps, which can be the tray
- Any battery past its second summer on a car that parks outdoors
Your GLC300 Visit, Step by Step
X253 or X254
X253 or X254 from the year or VIN. It decides where the battery is and what else needs testing.
Technician Arrives
Anywhere in Dubai, typically within about 30 minutes, 24 hours a day, with the right AGM on board.
System Tested, Tray Checked
Battery, auxiliary, charging and 48V where fitted, plus the tray and clamp on an X253.
Replaced and Coded
New AGM fitted and registered, messages cleared, invoice and warranty issued, old battery taken for recycling.
Mercedes GLC300 Battery Questions
On the X253 built from 2015 to 2022 it is in the engine bay on the passenger side, under the plastic cover in front of the windscreen. On the X254 from 2022 it moved to the rear of the car, and the 48V lithium battery sits at the front under the cabin air filter. We confirm the generation from the year before setting off.
An AGM of 80 to 92Ah in an H7 or H8 case depending on the generation and equipment. The exact fitment comes from your VIN rather than the badge, because equipment level changes the answer.
On the X253 it refers to the small unit under the passenger footwell carpet, which on some cars is a battery and on others a capacitor. It supports the electronics during start-stop restarts. Replacing the main battery does not clear the message; testing and replacing the auxiliary unit does.
Yes. The X254 runs the M254 engine with an integrated starter generator and a lithium 48V battery at the front of the car under the cabin air filter. It is charged through the 12V battery by a converter, so the 12V still matters as much as it ever did.
Because the X253's tray is a reported weak point on 2015 to 2023 Mercedes C, E and GLC models, and a cracked tray lets the battery move. Movement shortens battery life and causes intermittent electrical faults. It takes a minute to inspect while the battery is out.
Yes, on both generations. The car charges according to what it knows about the battery, so a new one has to be declared or it is under- or over-charged from the start. It is coded at your location as part of every fitting.
Not Your Model?
We fit batteries across the whole Mercedes-Benz range, and the marque page lists every model we cover.
Every Part of Dubai, Covered
Our vans work from points spread across the city, so the one nearest you is sent. Response is quickest around Business Bay and Downtown Dubai, and just as dependable out to Al Karama, Al Jaddaf and every home, office district and highway in between.
GLC300 Battery Due? Front or Back, We Know Which
Tell us the year. The correct AGM comes to you anywhere in Dubai, the car and its tray are tested and checked, and the battery is fitted and coded on the spot. Day or night.
- Both batteries tested
- Coded to the car
- Old unit recycled