Mercedes-Benz GLS Service & Repair in Hyderabad
X166 · X167 · GLS 400d / GLS 450 / Maybach GLS 600 / AMG GLS 63 · 9G-Tronic · AIRMATIC + E-Active Body Control · XENTRY diagnostics · genuine MB parts · 1-yr warranty
The Mercedes-Benz GLS is the brand's full-size flagship SUV — often called "the S-Class of SUVs" — and it is one of the most demanding vehicles to service properly in Hyderabad. At Metre Per Second we look after both the X166 and the current X167 GLS, covering the diesel GLS 400d (OM656 3.0 inline-six), the petrol GLS 450 (M256 3.0 inline-six with EQ Boost 48V), and the V8 biturbo Maybach GLS 600 and AMG GLS 63 (M177 4.0). This is a heavy, three-row, 48V-equipped luxury SUV with AIRMATIC air suspension and E-Active Body Control, so it needs a workshop with genuine Mercedes-Benz parts, full Star Diagnosis (XENTRY / DAS) and technicians who understand its inline-six mild-hybrid and V8 platforms. We deliver authorised-workshop quality on the GLS at 35–50% below dealer cost.
Owning a GLS in Hyderabad means running a two-and-a-half-tonne luxury SUV that combines an air-suspension chassis, a 48V electrical architecture and a highly stressed 9G-Tronic gearbox — and dealer bills for it are eye-watering. Metre Per Second is the independent specialist that GLS owners turn to once the factory warranty ends: we run factory XENTRY diagnostics with SCN online coding across every control unit, use genuine and OEM-supplier parts (Bosch, Mahle, Bilstein, ZF, Continental, ATE, Brembo), and we know the exact failure patterns of the OM656 and M256 straight-sixes, the M177 V8, the AIRMATIC struts and the E-Active Body Control 48V hydraulics in Hyderabad's heat, potholes and stop-go traffic. Every GLS job leaves with a written fixed-price estimate before work starts and a 1-year MPS warranty. Free pickup and drop is available across Gachibowli, Jubilee Hills, Banjara Hills, Hitech City, Kondapur and KPHB.
Chassis codes: X166 / X167 · Body type: Full-size Luxury 7-Seat SUV (S-Class of SUVs) · Years sold: 2016 – present (the X166 first "GLS" and the current X167, Mercedes-Benz's full-size flagship SUV, both running as chauffeur and family cars across Hyderabad)
Engines — Mercedes-Benz GLS
- GLS 400d (diesel) (OM656 3.0L inline-6 turbo diesel) — The mainstay engine in Hyderabad — a smooth, torquey straight-six with a two-stage turbo. Very durable but needs strict genuine low-SAPS oil changes (MB 229.51/229.71), correct oil filters, and DPF/AdBlue discipline. Watch the timing chain, EGR cooler and the 48V starter-generator belt on later cars.
- GLS 450 (petrol) (M256 3.0L inline-6 turbo petrol + EQ Boost 48V ISG) — Uses an integrated 48V starter-generator with an electric auxiliary compressor. The 48V system, the belt-driven ISG and the electric water pump need MB-specific diagnostics; timing chain and PCV wear appear at higher mileage. Requires MB 229.5-spec oil and clean 48V battery health.
- Maybach GLS 600 (petrol V8) (M177 4.0L V8 biturbo + EQ Boost 48V) — Ultra-luxury flagship — hot-vee biturbo V8 with 48V boost. Cooling load, oil-cooler and turbo oil-feed lines, plus E-Active Body Control, demand experienced diagnostics and correct torque specs. Genuine oil and coolant are non-negotiable.
- AMG GLS 63 (petrol V8) (M177 4.0L V8 biturbo (AMG) + EQ Boost 48V) — Performance V8 — high-load cooling, carbon build-up on direct-injection, brake and tyre wear. Needs AMG-experienced diagnostics, correct MB 229.5/229.71 oil, and periodic AIRMATIC/E-ABC checks under hard use.
Transmission & Drivetrain
- 9G-TRONIC 725.0 9-speed automatic (9G-TRONIC) — applies to GLS 400d / GLS 450 (inline-six). A very capable 9-speed but heavily loaded in a 2.5-tonne SUV. The conductor plate/valve body, torque-converter lock-up clutch and degraded ATF cause shudder, harsh shifts and limp mode. Genuine MB 236.17 ATF filled to temperature via XENTRY every 60–80k km is essential.
- AMG SPEEDSHIFT TCT / 9G-TRONIC (V8) (9G-TRONIC) — applies to Maybach GLS 600 / AMG GLS 63. The V8 variants use a reinforced 9-speed calibrated for high torque. Fluid and lock-up clutch health matter even more under V8 loads; correct ATF service and adaptation via XENTRY keep shifts crisp.
- 4MATIC permanent all-wheel drive + transfer case (4MATIC) — applies to All GLS variants. Permanent 4MATIC with a transfer case (and torque-vectoring/low range on off-road pack). The transfer-case fluid, front prop-shaft support bearing and CV boots are periodic-inspection items; neglect causes driveline whine and vibration.
Suspension & Brakes
Suspension: AIRMATIC air suspension with adaptive dampers on all variants; E-Active Body Control (48V hydraulic active suspension) optional on GLS 450/Maybach/AMG
On the GLS the air suspension does all the heavy lifting, so the most common Hyderabad complaints are AIRMATIC air-strut bag leaks (car sits low overnight or on one corner), a worn or overworked air compressor, and valve-block or level-sensor faults. On cars with E-Active Body Control, the 48V hydraulic pump, accumulators and the ride-height/road-scan calibration need specialist diagnosis. We repair individual struts, compressors and valve blocks with genuine/Bilstein parts and recalibrate on XENTRY rather than forcing an expensive full-axle dealer replacement — a huge saving on a vehicle this heavy.
Periodic Maintenance Schedule (PMS) — GLS
| Interval | Service | Inclusions | Price Range (INR) |
|---|---|---|---|
| Service A · 15,000 km / 1 yr | Minor Service (Service A) | Genuine MB 229.51/229.71 engine oil + oil filter, cabin/pollen filter, fluid top-ups, AdBlue top-up (diesel), brake & tyre inspection, AIRMATIC ride-height check, full XENTRY health scan, ASSYST reset | ₹22,000 – ₹34,000 |
| Service B · 30,000 km / 2 yr | Major Service (Service B) | Engine oil + filter, air filter(s), cabin filter, brake fluid change, coolant check, spark plugs (petrol, as due), AdBlue service (diesel), 48V/12V battery health, full diagnostic scan, road test | ₹38,000 – ₹62,000 |
| 60,000 km / 4 yr | Transmission, Transfer-Case & Fuel Service | 9G-Tronic ATF + filter/pan change with XENTRY fill, transfer-case fluid, fuel filter (diesel), spark plugs, brake pads inspection, AIRMATIC/E-ABC audit, alignment | ₹55,000 – ₹95,000 |
| 90,000 km+ | High-Mileage Flagship Overhaul | Major service + timing chain inspection, EGR/turbo & 48V belt check, AIRMATIC/E-ABC overhaul as required, DPF/AdBlue health (diesel), transfer-case & driveline audit, full brake overhaul | ₹75,000 – ₹2,20,000 |
All prices are 35–50% below authorised Mercedes-Benz dealer rates with the same genuine / OEM-supplier parts.
Common GLS Faults & Hyderabad Pricing
| Area | Symptom | Root Cause | Fix Price (INR) |
|---|---|---|---|
| AIRMATIC suspension | Car sits low overnight or leans on one corner, harsh ride, warning message | Air-strut bag leak / compressor wear / valve-block or level-sensor fault | ₹40,000 – ₹1,80,000 |
| E-Active Body Control (48V) | Active suspension inactive, ride height errors, hydraulic warnings | 48V hydraulic pump / accumulator / calibration fault (GLS 450/Maybach/AMG) | ₹55,000 – ₹3,00,000 |
| Transmission | Shudder, harsh or delayed shifts, limp mode | 9G-Tronic 725.0 conductor plate/valve-body wear or degraded ATF under SUV load | ₹45,000 – ₹1,80,000 |
| Engine (diesel) | Power loss, rattle, oil weep, emissions warning | OM656 timing chain / EGR cooler / turbo actuator or oil-cooler seal wear | ₹35,000 – ₹1,60,000 |
| 48V mild-hybrid (petrol) | Rough start-stop, 48V/EQ Boost warning, electric compressor fault | M256/M177 ISG belt, 48V battery or electric auxiliary compressor fault | ₹30,000 – ₹1,50,000 |
| Diesel emissions | AdBlue / DPF warning, reduced power, limp mode | DPF loading, NOx sensor or AdBlue injector/pump fault (OM656) | ₹15,000 – ₹95,000 |
| Transfer case / driveline | Whine or vibration at speed, AWD warning | Transfer-case fluid degradation, prop-shaft support bearing or CV-joint wear | ₹22,000 – ₹90,000 |
Genuine & OEM Parts
- Engine oil (diesel) — MB 229.51 / 229.71 5W-30 low-SAPS (genuine MB / Fuchs). Low-ash oil is essential to protect the DPF and turbo on the OM656.
- Engine oil (petrol V8/I6) — MB 229.5 / 229.71 5W-30/40 (genuine MB / Mobil 1 ESP). Correct spec protects the M256/M177 timing chain, turbos and 48V ISG.
- Oil filter — Mahle / Mann genuine element (e.g. A654 180 00 09 OM656 family). Always OEM-spec cartridge — cheap filters bypass under pressure.
- 9G-Tronic ATF — MB 236.17 (Fuchs/genuine). Filled to temperature via XENTRY — critical on a heavy SUV to avoid shudder.
- AIRMATIC air strut / compressor — Genuine MB / Bilstein air strut & compressor. Individual strut/compressor repair instead of a full-axle dealer swap.
- AdBlue / DEF & NOx sensor — ISO 22241 DEF, genuine Bosch NOx sensor. Correct DEF and SCN coding prevent recurring emissions faults on the OM656.
Star Diagnosis (XENTRY) — GLS
Every GLS starts with a full Mercedes XENTRY / DAS diagnostic across all control units — engine, 9G-Tronic, 4MATIC/transfer case, AIRMATIC and E-Active Body Control, the 48V/EQ Boost system, ESP, SAM and the extensive comfort/driver-assist modules — not a generic OBD read. The air suspension and E-ABC require MB-specific ride-height calibration and guided component tests, the 48V hybrid needs safe-handling and battery diagnostics, and we perform SCN online coding, control-unit programming and after-repair calibrations (steering-angle, camera/radar, level sensors) so the GLS leaves fault-free.
Frequently Asked Questions — GLS
How much does a Mercedes GLS service cost in Hyderabad?
A minor Service A on the GLS typically runs ₹22,000–₹34,000 and a major Service B ₹38,000–₹62,000 depending on engine (GLS 400d, GLS 450, Maybach 600, AMG 63) and what is due. We give a fixed written quote after a free inspection — usually 35–50% below dealer pricing with genuine parts.
My GLS is sitting low on one corner in the morning — is that the air suspension?
Yes, that is the classic sign of an AIRMATIC air-strut bag leak, though it can also be a valve block or a tired compressor. We diagnose it on XENTRY, pressure-test the system and repair only the failed strut/compressor/valve with genuine or Bilstein parts, then recalibrate ride height — far cheaper than the dealer's full replacement.
Do you service the diesel GLS 400d and the V8 GLS 63/Maybach 600?
Yes — the OM656 straight-six diesel, the M256 petrol straight-six with 48V EQ Boost, and the M177 4.0 V8 biturbo in the AMG GLS 63 and Maybach GLS 600. Each has its own known issues and we stock the correct genuine oils, filters and parts, plus AMG-experienced diagnostics for the V8s.
Is the 9G-Tronic gearbox reliable in such a heavy SUV?
It is capable but heavily loaded in a 2.5-tonne GLS, so we strongly recommend an ATF + filter change every 60,000–80,000 km with genuine MB 236.17 fluid filled to temperature via XENTRY. That prevents the shudder, harsh shifts and valve-body wear that lead to very costly repairs if neglected.
What is E-Active Body Control and can you repair it?
E-Active Body Control is Mercedes' 48V hydraulic active suspension fitted to GLS 450, Maybach and AMG models. It can develop pump, accumulator, sensor or calibration faults. We diagnose the exact component on XENTRY and repair it with genuine parts and proper recalibration rather than replacing the whole system.
Is it safe to service my GLS outside the Mercedes dealership?
Absolutely. We use genuine/OEM parts and full XENTRY diagnostics with SCN coding, and issue a 1-year warranty. For a GLS out of factory warranty, an independent specialist like MPS delivers dealer-grade work — including AIRMATIC, 48V and transmission jobs — at a much lower cost.
Do you offer free pickup and drop for GLS service?
Yes — free pickup and drop across Gachibowli, Jubilee Hills, Banjara Hills, Hitech City, Kondapur, KPHB and the wider Hyderabad area on any GLS service. Given the size of the vehicle, we handle collection and return so you never have to bring it in yourself. Call or WhatsApp 8555824915.
How long does a major GLS service take?
A Service B is usually completed same-day. AIRMATIC/E-ABC work, transmission service, timing chain or transfer-case jobs take 1–3 days depending on parts availability. We keep you updated throughout and provide a courtesy drop-back.
Customer Reviews — Mercedes GLS
My GLS 400d was sitting low overnight and the ride went harsh. The dealer quoted a fortune for a full air-suspension replacement. MPS diagnosed a single leaking AIRMATIC strut and a tired compressor, fixed only those with genuine parts and recalibrated it. Rides like new and saved me over a lakh. Free pickup from Jubilee Hills.
The 48V/EQ Boost warning kept popping up with rough start-stop. MPS ran a proper XENTRY diagnosis, traced it to the ISG belt and 48V system, and sorted it with genuine parts. Very knowledgeable about the mild-hybrid setup — much better than the generic garages I tried. Picked up from Gachibowli.
Finally a Hyderabad workshop I trust with a Maybach GLS. They did a full service, sorted an E-Active Body Control calibration and used only genuine parts with a written report. Chauffeur-collected from Banjara Hills, returned spotless. Truly dealer-level work at a sensible price.
Persistent AdBlue and DPF warnings with power loss on my older GLS. MPS ran a forced regeneration, replaced a faulty NOx sensor with a genuine Bosch part and did the transfer-case fluid too. No more warnings and the whole thing was transparent with fixed pricing. Highly recommend for big Mercedes SUVs.
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Free pickup & drop across: Gachibowli, Jubilee Hills, Banjara Hills, Hitech City, Kondapur, KPHB, Kukatpally, Madhapur, Gajularamaram, Financial District, Manikonda, Secunderabad.
Book Mercedes-Benz GLS Service — Metre Per Second
Call +91 8555824915 or WhatsApp +91 8555824915 for a free quote.
Workshop: Plot No. M-8, Mahadevpuram, KPHB Road, Gajularamaram, Hyderabad, Telangana 500055