Shiftech: specialists in automatic gearboxes since 2008
Mercedes automatic gearbox oil change
Your Mercedes is fitted with either a dual-clutch or torque converter automatic gearbox, depending on the model and generation. At Shiftech, we use the MotulEvo process to completely replace the transmission fluid, without the compromises associated with a conventional manual drain.
Why should you change the fluid in your Mercedes’ automatic gearbox?
Mercedes automatic gearboxes have long been marketed as ‘maintenance-free for life’ – a misconception that still persists in some dealership networks. In practice, transmission fluid that is never changed degrades thermally and loses its lubricating properties as the mileage increases, whether the gearbox is a dual-clutch unit or a torque converter type.
In a Mercedes, the first signs that an automatic gearbox is starting to wear out are often subtle: a slight jolt when shifting from first to second gear, a longer response time when the engine is cold, or a fleeting sensation of wheel spin during vigorous acceleration. These symptoms, which are still reversible at this stage, quickly become signs of more advanced wear if nothing is done.
Repairing a faulty automatic gearbox on a Mercedes represents a significantly higher investment than the cost of regular preventive maintenance. It is precisely the difference between these two scenarios that justifies having the oil changed at regular intervals rather than waiting until the gearbox fails.
The automatic gearboxes fitted to Mercedes cars
Mercedes-Benz has continued to develop its automatic transmissions over successive generations. Compact models (the latest-generation A-Class, B-Class, CLA and GLA) are most often fitted with a 7G-DCT dual-clutch gearbox, whilst saloons and SUVs in the higher-end range (C-Class, E-Class, S-Class, GLC, GLE) traditionally use torque converter automatic gearboxes, with 7, 9 or, more recently, even more gears depending on the generation.
These two families of gearboxes do not share the same internal architecture or fluid requirements, but they do have one thing in common: their transmission fluid degrades over time and with use, and requires a complete change to maintain its lubricating and heat-transfer properties.
You can view our MotulEvo automatic gearbox maintenance procedure, which details our methodology, applicable to all the automatic gearboxes we service, including those from Mercedes.
The MotulEvo process applied to your Mercedes
1Cleaning and rinsing
2Draining and flushing with Motul Transmission Clean additive
3Replacing filters and seals
4Dynamic fluid exchange via the MotulEvo station
5Final check and adjustments
In a Mercedes automatic gearbox, whether it is a dual-clutch or torque converter type, a standard manual oil change only replaces around 65 per cent of the total fluid, with the rest remaining trapped in the hydraulic circuit and the torque converter. The MotulEvo process uses a specialised machine that ensures a dynamic fluid exchange, resulting in 100 per cent fresh oil.
| Criterion | Manual oil change | MotulEvo at Shiftech |
| New fluid in the gearbox | ~ 65 per cent | 100% |
| Remaining residue | ~ 40% | 0% |
| Circuit cleaning | No | Yes |
| Suitable for all automatic gearboxes | Limited | All transmissions |
Prices and service duration
Mercedes automatic gearbox fluid changes are available from €499 (including VAT ) at our Shiftech centres. This price includes:
- Service duration: 1h30 to 2h
- By appointment only: Tuesday to Saturday, 9.00 am–12.30 pm / 2.00 pm–6.00 pm
By way of comparison, the complete replacement of a Mercedes automatic gearbox in the event of a major breakdown represents a cost far greater than several preventive maintenance cycles. It is this difference that makes regular fluid changes economically sensible, beyond the purely mechanical aspect.
FAQ
Frequently asked questions about Mercedes gearboxes
This claim is widely circulated, but it fails to take into account the thermal and chemical degradation of the fluid over time. An automatic gearbox can operate for a long time without a fluid change, but at the cost of accelerated wear and tear on its internal components.
It depends on the model, the gearbox generation and how you use it. Generally between 40,000 and 60,000 km, depending on how you use your vehicle. A Shiftech centre can assess the appropriate service interval for your vehicle during a diagnostic check.
The 7G-DCT is a dual-clutch gearbox, which uses two separate clutches to engage even and odd gears. Torque converter transmissions, which are more common in Mercedes’ higher-end ranges, use a hydraulic torque converter to transmit engine torque.
Yes, our centres service the entire Mercedes range, from compact city cars to top-of-the-range saloons and SUVs.
Sporty driving places greater demands on the thermal transmission. A tighter gear ratio is generally recommended for AMG variants.
Other brands and services available at Shiftech
The MotulEvo method and our expertise in automatic transmissions are not limited to Mercedes. If your vehicle is from another manufacturer, find out about our dedicated services.
BMW automatic gearbox fluid change
The ZF 8HP and DKG transmissions fitted to the BMW range, from the 1 Series to the M models, are serviced using the same dynamic fluid exchange protocol.
Audi automatic gearbox fluid change
The S tronic, fitted to the entire range of Audi models with automatic gearboxes, from the A1 to the RS6, using a protocol tailored to this dual-clutch transmission.
Renault automatic gearbox fluid change
The Renault Group’s EDC gearbox, fitted to the Clio, Mégane, Captur and the entire Dacia and Alpine ranges.
Our other services at Shiftech
7G-DCT / torque converter gearbox remapping Faster gear changes, increased torque capacity, bespoke mapping developed in-house for over 15 years. → Fine-tune the performance of your automatic gearbox
Stage 1, 2 and 3 engine remapping Particularly suited to the A-Class 35 AMG, C 43 AMG and GLC 63 AMG. → Optimise your engine’s performance
