7G-DCT
C117/X117 mainstream automatics use Mercedes seven-speed dual-clutch technology, where clutch touch points affect parking and pull-away smoothness.
Mercedes-Benz CLA Gearbox Repair Specialists in the South East
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Mercedes-Benz CLA 7G/8G-DCT Specialists
Mercedes-Benz CLA Gearbox Repair Specialists in the South East
The Mercedes-Benz CLA is primarily a dual-clutch model, but the gearbox has evolved across generations. C117/X117 cars use 7G-DCT on mainstream automatics, while C118 diesel and performance derivatives can use eight-speed DCT variants. New-generation electrified CLA powertrains add further hybrid and EV-specific drive hardware.
A first-generation CLA that judders when reversing and a later CLA 220d that hesitates during an 8G-DCT shift need generation-specific clutch and actuator data. AMG derivatives also require the correct Speedshift calibration and higher-load testing.
Diagnostics From £30Identify the fault first
Fixed QuoteBefore repair work begins
Mercedes-Benz Transmission Specialists7G/8G-DCT
Repair WarrantyConfirmed with your quotation
Which CLA Do You Have?
Mercedes-Benz CLA Versions and Automatic Gearboxes
The Mercedes-Benz CLA is primarily a dual-clutch model, but the gearbox has evolved across generations. C117/X117 cars use 7G-DCT on mainstream automatics, while C118 diesel and performance derivatives can use eight-speed DCT variants. New-generation electrified CLA powertrains add further hybrid and EV-specific drive hardware.
| CLA version | Typical transmission / drive | Key diagnostic areas | What owners often search |
|---|---|---|---|
| CLA C117 / X117, 2013–2019 | 7G-DCT on mainstream automatic derivatives | Clutch, actuator, adaptations and temperature | CLA 7G-DCT judder, gearbox fault |
| CLA C118 petrol | 7G-DCT on selected engines | Low-speed clutch control and mechatronic operation | CLA delayed Drive, DCT warning |
| CLA C118 diesel / selected later models | 8G-DCT | 8-speed clutch, actuator and ratio control | CLA 200d 8G-DCT problems |
| AMG CLA 35 / CLA 45 | 7- or 8-speed AMG Speedshift DCT depending derivative | High-load clutch, temperature and control data | AMG CLA gearbox warning, harsh shift |
Check the specification: CLA DCT fitment varies by chassis, engine and AMG specification. Confirm the exact transmission code before clutch, mechatronic or control-unit parts are ordered.
Transmission Families
First Generation
Later Applications
AMG Models
Electrified CLA
Mercedes-Benz CLA Gearbox and Drivetrain Types Explained
8G-DCT
Selected C118 diesels and performance models use an eight-speed DCT with different clutch and control hardware.
AMG SPEEDSHIFT DCT
Performance calibrations and higher torque make temperature, clutch pressure and correct adaptation particularly important.
Hybrid / EV Drive
Newer electrified CLA versions need powertrain identification because hybrid DCT and electric drive faults are not conventional 7G-DCT repairs.
Common Problems
Common Mercedes-Benz CLA Gearbox Issues
High-intent searches include “Mercedes CLA gearbox problems”, “CLA 7G-DCT judder”, “CLA 8G-DCT fault”, “CLA delayed Reverse”, “CLA transmission malfunction”, “Mercedes CLA gearbox repair cost”. The symptom becomes useful when it is matched to the exact transmission, vehicle temperature and load.
Judder Pulling Away
Clutch wear, touch-point adaptation or actuator control can make the CLA shake as drive takes up.
Delayed Drive / Reverse
Clutch actuation or control pressure can create a pause before the CLA starts to move.
Loss of One Gear Set
A clutch-side or selector/control fault can affect alternate gears or cause intermittent gear loss.
Hybrid Handover Hesitation
Engine/electric torque transitions can expose clutch, transmission-control or hybrid-system faults in the CLA.
Drive-Unit Whine
Reduction gearing, motor bearings or inverter/motor operation can create noise or warnings on electric CLA versions.
Transmission Warning / Limp Mode
Pressure, ratio, speed, clutch, temperature or powertrain faults can restrict operation and store diagnostic data.
Describe the Symptom
What Does a Mercedes-Benz CLA Gearbox Fault Sound or Feel Like?
Tell us whether the problem appears from cold, after warming up, while parking, at steady cruise or under stronger engine, hybrid or drivetrain load.
| What you notice | How owners often describe it | Possible areas to investigate |
|---|---|---|
| Low-speed judder | “It shakes or grabs when I pull away.” | Clutch wear/touch points, actuator, adaptation |
| Pause into Reverse | “I select R and it takes a moment to move.” | Clutch actuation, control pressure, selector data |
| Handover hesitation | “It hesitates as the engine/electric drive changes over.” | Clutch/transmission control plus hybrid torque data |
| Electric drive noise | “There is a whine or rumble but no normal gear changes.” | Reduction gear, motor bearings, inverter/motor data |
Diagnostic Trouble Codes
Mercedes-Benz CLA Gearbox and Drivetrain Fault Codes
Stored fault codes should be interpreted with live pressure, clutch/converter or CVT ratio data, temperature and drivetrain information rather than being used as a parts list.
| Fault / code family | Broad area | What should be checked |
|---|---|---|
| Clutch / actuator faults | Dual-clutch engagement | Clutch position, wear/adaptation, actuator movement and temperature |
| Ratio / speed faults | DCT gear path | Input/output speed, commanded gear and clutch-side slip |
| Hybrid / powertrain faults | Electrified torque coordination | Engine/motor torque requests, transmission clutch state and hybrid-module data |
| Electric drive faults | Motor / inverter / reduction drive | Motor speed, inverter data, bearings and reduction gearing |
| Temperature / protection faults | Transmission safeguard | Heat history, fluid condition and repeated slip |
On the CLA, codes should be interpreted with the exact transmission, freeze-frame information and live gearbox/drivetrain values before complete transmission replacement is considered.
Repair Costs
How Much Does a Mercedes-Benz CLA Gearbox Repair Cost?
Repair pricing depends on the exact gearbox and whether the failure sits in the clutch/control system, valve body, converter/CVT, internal transmission or a driveline component outside the gearbox.
| Mercedes-Benz CLA gearbox work | Typical guide range | What can change the price? |
|---|---|---|
| Gearbox / drivetrain diagnostic assessment | From £30 | Transmission type, vehicle specification and fault reproduction |
| DCT clutch / targeted control repair | Approx. £900 - £2.2k+ | Clutch condition, actuator and adaptation requirements |
| Hybrid / electric drive work | Diagnosis required | Power electronics, drive unit and transmission involvement |
| Full gearbox reconditioning | Approx. £2.2k - £5.3k+ | Internal damage, gearbox family and vehicle specification |
Important: These are broad guide ranges rather than fixed advertised prices. The final quotation follows diagnosis of the exact transmission and fault.
Diagnosis Before Parts
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How We Diagnose a Mercedes-Benz CLA Gearbox Fault
Identify the transmission
Confirm CLA generation, engine, automatic/drive system and drivetrain configuration from vehicle data.
Read Mercedes-Benz-specific data
Read pressure, ratio, clutch/converter, temperature and related powertrain information with compatible diagnostics.
Reproduce the symptom
Reproduce the CLA delay, shudder, harsh shift, slip or warning under the speed, temperature and load where it occurs.
Quote the right repair
Quote the specific clutch, valve-body, converter, CVT, drive-unit, internal gearbox or driveline repair supported by testing.
Mercedes-Benz CLA Gearbox Fault? Speak to a Specialist.
Tell us whether your CLA delays into Drive, judders, shifts harshly, slips, loses drive, makes a transmission noise or displays a gearbox/drivetrain warning.
South-East Coverage
Mercedes-Benz CLA Gearbox Repairs Across the South East
Mercedes-Benz CLA transmission diagnosis and repair is available across the South East, with model-specific assessment of the automatic, DCT, CVT, hybrid/electric or driveline system actually fitted to the vehicle.
This page answers model-specific owner questions around CLA 7G-DCT judder, CLA 8G-DCT fault and CLA delayed Reverse so the exact CLA transmission can be distinguished from wider Mercedes-Benz gearbox faults.
More Mercedes-Benz gearbox guides:
For wider Mercedes-Benz transmission information, visit our Mercedes-Benz gearbox repair page for the South East.
Common Search Questions
Mercedes-Benz CLA Gearbox Problems: Straight Answers
What automatic gearbox does the Mercedes-Benz CLA use?
C117/X117 CLA automatics commonly use 7G-DCT. Later C118 versions can use 7G-DCT or 8G-DCT depending on engine, with AMG derivatives using their own Speedshift DCT specifications.
Why does my Mercedes-Benz CLA judder when pulling away?
On dual-clutch versions, clutch wear, clutch touch-point adaptation and actuator/control behaviour are key areas to test. The exact transmission should be confirmed before a clutch is condemned.
Does every Mercedes-Benz CLA have a conventional automatic gearbox?
No. Electric versions use a reduction drive rather than a normal multi-speed automatic, so motor, inverter and reduction-gear faults need a different diagnostic route.
Can the CLA DCT clutch or actuator be repaired?
Depending on the confirmed fault, clutch, actuator/mechatronic and internal DCT repairs may be possible. Correct adaptation or calibration forms part of the completed repair where required.
How much does a Mercedes-Benz CLA gearbox repair cost?
The price depends on the transmission fitted and whether the fault is a targeted control/clutch/converter repair or deeper internal damage. The guide ranges on this page are broad; a fixed quotation follows diagnosis.
Should I keep driving a Mercedes-Benz CLA with a slipping gearbox?
Strong slip, loss of drive, overheating or repeated limp mode can increase internal damage. Reduce use and arrange diagnosis before towing, hard acceleration or unnecessary journeys.
Get a Mercedes-Benz CLA Gearbox Diagnosis
CLA DCT fitment varies by chassis, engine and AMG specification. Confirm the exact transmission code before clutch, mechatronic or control-unit parts are ordered. Describe the exact symptom and when it happens so the next diagnostic step matches the transmission fitted.
