Does a 7-speed DSG need servicing?

It depends on the gearbox type. VW Group's published table lists no fluid change interval for the 7-speed DQ200, while the other DSG types it lists have fluid changes at set mileages. We confirm what applies to your car from its own schedule.

Is a ZF automatic gearbox sealed for life?

ZF says it fills its 6-speed and 8-speed automatics maintenance-free, but it recommends an oil change after 150,000 km (about 93,000 miles), and sooner with high temperatures, heavy loads or an unknown history.

Which fluid goes in a Mercedes 7G-Tronic?

Fluid to Mercedes-Benz sheet 236.14 or 236.15, depending on how the gearbox was built. The two cannot be mixed, so we confirm which one your gearbox takes before any work.

Do you repair gearbox faults?

The check and the fluid service do not include repairs inside the gearbox. If the check points to an internal fault, we explain in writing what we found and what the options are.

DSG, S tronic, ZF, 7G-Tronic and 9G-Tronic

Book a gearbox health check

The transmission condition check looks at the fluid condition, fault memory and on-road behaviour of DSG and S tronic, ZF automatic and Mercedes 7G-Tronic and 9G-Tronic gearboxes. You get written advice on what the gearbox needs, and any servicing is carried out to the maker's procedure when you give us your written approval.

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Last updated 12 November 2026

Which gearboxes does the check cover?

DSG and S tronic dual-clutch gearboxes in Volkswagen Group cars, including Audi’s S tronic
ZF automatics, including the 6-speed and 8-speed
Mercedes-Benz 7G-Tronic and 9G-Tronic automatics

What does the check cover?

Fluid condition. We check the condition of the gearbox fluid.
Fault memory. We read the faults stored by the gearbox control unit.
Road test. We drive the car to check how the gearbox shifts and behaves.
Schedule. We check the maker’s schedule for your car to see whether a fluid service is due.

What do I get?

Written advice on what the gearbox needs, with a written price for any work. Nothing is done without your written approval.

How do you service a gearbox to the maker’s procedure?

Intervals and fluids differ from one gearbox to the next, so we confirm both for your car before any work.

ZF automatics. ZF fills its 6-speed and 8-speed automatics maintenance-free, but recommends an oil change after 150,000 km (about 93,000 miles), sooner with high temperatures and heavy loads or where the history is unknown. The level is set with the oil between 30 and 50 °C. Where the sump is plastic, the filter is built into it.
Mercedes 7G-Tronic and 9G-Tronic. Mercedes lists the fluid by specification sheet: 236.14 or 236.15 for the 7G-Tronic (722.9), depending on build, and the two cannot be mixed; 236.17 for the 9G-Tronic 725.0; and 236.18 preferred for the 725.1. The interval varies, so we work from your vehicle’s own schedule.
DSG and S tronic. VW Group’s published table gives different intervals by gearbox type, and some types have a filter change as well as fluid. It lists no fluid change interval for the 7-speed DQ200.

What happens next?

Send the enquiry form on this page and tell us what the gearbox is doing.
We contact you to confirm a booking.
We carry out the check and give you written advice.
You decide. Nothing is done without your written approval.
If you book a fluid service, we carry it out to the maker’s procedure and road test the car again.

What is not included?

the fluid service itself, which is priced in your written advice
repairs inside the gearbox, including the mechatronic unit
recall work, which is done by the manufacturer’s network: check your car on gov.uk

For routine servicing planned from your car’s own schedule, see Service with Continuity.

Reverie Autocare is an independent specialist and is not affiliated with or endorsed by BMW, MINI, Mercedes-Benz, Audi, Volkswagen, Jaguar Land Rover, Land Rover or Range Rover.

Our promise on every job

Written approval before any extra work
Photographic proof of what we find
A promised update time
No surprise invoice
A test drive and verification where appropriate

Our service centre

Where will my car be looked after?

At our centre at 57 Great North Road, Welwyn Garden City, built so that waiting for your car is not wasted time.

Seven ramps and an on-site MOT bay
Three customer waiting areas
A co-working space with Wi-Fi
A multi-faith prayer room and quiet room
Lavazza coffee
Customer parking

Questions people ask us

Does a 7-speed DSG need servicing?: It depends on the gearbox type. VW Group's published table lists no fluid change interval for the 7-speed DQ200, while the other DSG types it lists have fluid changes at set mileages. We confirm what applies to your car from its own schedule.
Is a ZF automatic gearbox sealed for life?: ZF says it fills its 6-speed and 8-speed automatics maintenance-free, but it recommends an oil change after 150,000 km (about 93,000 miles), and sooner with high temperatures, heavy loads or an unknown history.
Which fluid goes in a Mercedes 7G-Tronic?: Fluid to Mercedes-Benz sheet 236.14 or 236.15, depending on how the gearbox was built. The two cannot be mixed, so we confirm which one your gearbox takes before any work.
Do you repair gearbox faults?: The check and the fluid service do not include repairs inside the gearbox. If the check points to an internal fault, we explain in writing what we found and what the options are.