What each repair involves on the C-Class, and what our invoices say it costs
Gearbox oil changes on the C-Class
26% of the C-Class registrations in our records had at least one invoice involving this work (78 of 301, 87 invoices in all). Those visits typically cost about $900 (middle half $650 to $1,400, 70 priced visits since 2023, whole invoice including GST).
Gearbox oil lubricates moving parts, carries hydraulic pressure and removes heat. Degraded fluid can bring hesitant shifts, shuddering or a burnt smell. Waiting can increase heat and friction inside the gearbox, leading to broader wear.
We inspect the fluid condition and leaks, road-test the shift quality, and review XENTRY fault data before recommending a fluid and filter change. If the evidence points to a separate fault, we quote that repair instead of treating the whole gearbox.
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Coolant leaks and cooling-system repairs on the C-Class
20% of the C-Class registrations in our records had at least one invoice involving this work (61 of 301, 65 invoices in all). Those visits typically cost about $1,800 (middle half $950 to $3,400, 53 priced visits since 2023, whole invoice including GST).
The water pump circulates coolant, the thermostat controls its flow, and the radiator releases heat. A warning, rising temperature, sweet smell or coloured puddle can point to a cooling-system fault. Delaying a repair can cause overheating and serious engine damage.
We use a cooling-system pressure test, leak-tracing dye and XENTRY temperature data to locate the source. We replace the leaking or failed pump, thermostat, radiator, hose or seal, while leaving sound parts in place.
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Brake pads, discs and wear sensors on the C-Class
18% of the C-Class registrations in our records had at least one invoice involving this work (54 of 301, 61 invoices in all). Those visits typically cost about $1,800 (middle half $900 to $2,700, 51 priced visits since 2023, whole invoice including GST).
Brake pads create friction against the discs, while wear sensors alert the driver when attention is due. Squealing, grinding, vibration or weaker braking can signal worn or damaged parts. Waiting can score the discs, reduce braking performance and widen the repair.
We measure the pad material and disc condition, inspect wear-sensor readings with XENTRY, and check for binding. We renew the worn parts identified by the measurements rather than replacing sound brake hardware.
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Battery replacement on the C-Class
16% of the C-Class registrations in our records had at least one invoice involving this work (48 of 301, 50 invoices in all). Those visits typically cost about $1,100 (middle half $500 to $1,750, 43 priced visits since 2023, whole invoice including GST).
The battery starts the engine and helps stabilise power for the car's electrical systems. Slow cranking, dim lights, warning messages or unreliable starting can appear when it weakens. Delaying a test can leave the car unable to start and may create misleading electrical faults.
We run a battery-health and charging-system test, then use XENTRY to check stored voltage faults. We replace the battery only when the results show it cannot hold or deliver the required charge.
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Sensor, switch and control-module faults on the C-Class
11% of the C-Class registrations in our records had at least one invoice involving this work (34 of 301, 38 invoices in all). Those visits typically cost about $1,650 (middle half $500 to $2,100, 30 priced visits since 2023, whole invoice including GST).
Sensors report operating conditions, switches provide driver inputs, and control modules coordinate connected systems. A fault may show as a warning light, an unavailable feature or erratic behaviour. An unresolved signal or circuit fault can affect related systems and make diagnosis harder.
We scan with XENTRY, compare live data with the reported symptoms, and test power, ground and signal paths. We repair the faulty sensor, switch, module or wiring section instead of changing a wider system by guesswork.
Spark plugs and ignition coils on the C-Class
11% of the C-Class registrations in our records had at least one invoice involving this work (32 of 301, 36 invoices in all). Those visits typically cost about $1,000 (middle half $700 to $1,600, 25 priced visits since 2023, whole invoice including GST).
Spark plugs ignite the fuel mixture, while ignition coils supply the voltage they need. Worn plugs or a weak coil can cause rough idling, hesitation, misfiring or a warning light. Continued misfiring can send unburned fuel into the exhaust and damage the catalytic converter.
We read XENTRY misfire data, inspect the plugs and test coil output under load. We renew the plugs or coil identified by testing, without disturbing unrelated ignition parts.
Gasket, seal, cover and housing oil leaks on the C-Class
7% of the C-Class registrations in our records had at least one invoice involving this work (22 of 301, 22 invoices in all). Those visits typically cost about $2,050 (middle half $1,250 to $3,800, 19 priced visits since 2023, whole invoice including GST).
Gaskets and seals keep engine oil inside while moving parts are lubricated. Drops under the car, a burning smell, smoke or a falling oil level can reveal a leak. Waiting can lower the oil supply and contaminate belts, mounts or nearby electrical parts.
We review XENTRY fault data, clean the area and trace the leak from the highest wet point, adding dye when needed. We renew the leaking gasket, seal, cover or housing while keeping dry parts untouched.
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Suspension absorbers, arms, bushes and links on the C-Class
7% of the C-Class registrations in our records had at least one invoice involving this work (21 of 301, 23 invoices in all). Those visits typically cost about $3,650 (middle half $2,250 to $4,650, 19 priced visits since 2023, whole invoice including GST).
Absorbers control body movement, while arms, bushes and links keep the wheels located. Knocks, vibration, pulling, a floating ride or uneven tyre wear can indicate wear. Delaying repairs can damage tyres, reduce stability and place extra load on nearby joints.
We road-test the vibration or knock, inspect mountings and joints on the lift, and use XENTRY when an electronic suspension warning is present. We replace the worn absorber, arm, bush or link shown by the inspection, not the whole suspension.
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Aircon cooling-coil leaks on the C-Class
7% of the C-Class registrations in our records had at least one invoice involving this work (21 of 301, 22 invoices in all). Those visits typically cost about $1,450 (middle half $1,400 to $1,750, 18 priced visits since 2023, whole invoice including GST).
The cooling coil absorbs heat from cabin air as refrigerant passes through it. A leak can cause weak cooling, warm air or cooling that fades after a gas top-up. Running with low refrigerant can reduce lubrication and place added strain on the compressor.
We test refrigerant pressures and vent temperature, use dye or an electronic detector to trace leakage, and read climate faults with XENTRY. We recommend a cooling coil only when testing confirms the leak, while checking the rest of the circuit for another source.
This aircon repair is covered by a warranty of at least 6 months.
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Aircon compressor faults on the C-Class
6% of the C-Class registrations in our records had at least one invoice involving this work (19 of 301, 20 invoices in all). Those visits typically cost about $1,300 (middle half $900 to $2,150, 12 priced visits since 2023, whole invoice including GST).
The compressor circulates refrigerant and creates the pressure difference needed for cabin cooling. Warm air, intermittent cooling or unusual noise can point to a compressor or control fault. If internal wear releases debris, continued operation can contaminate the circuit and damage related parts.
We compare refrigerant pressures, command the compressor through XENTRY, and check for noise, control faults and debris. We replace the compressor only when it fails those checks, rather than blaming it for every warm-air complaint.
This aircon repair is covered by a warranty of at least 6 months.
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