Mercedes-Benz 9G-Tronic Mechatronic Replacement Unit

SKU TRA5782

12-month warranty
Complete Mechatronic Unit
Fits Mercedes-Benz models
Restores transmission functionality

From £999.00

Fast Turnaround 2-5 working days

Warranty Protection Covering all our repairs

Choose your service

Replacement Units All replacements are sold on an exchange basis. If you need the unit shipped first, please contact our customer service. Replacement unit, supplied on an exchange basis. Data transfer included. £999.00 (Excl. 20% VAT)

Repl. & Fitting (on-site) Please call our customer service on 01884 798090 to schedule your appointment. No need to proceed to checkout. We remove, repair & refit the unit while you wait. Call 01884 798090 £1,499.00 (Excl. 20% VAT)

Service

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★★★★★ “Any issues with abs units this is the team to sort it 👍” — Adrian B.

★★★★★ “really good company , very fast repair done on a.b.s. control unit” — Anonymous

★★★★★ “Excellent service. Great company to deal with, very helpful. Would certainly use again.” — Gordon M.

★★★★★ “It’s good to have this gang on hand when it comes to gearbox electronics.” — Pawel P.

★★★★★ “Very professional , very prompt, well organised, thank you.” — Peter B.

★★★★★ “Good service on phone when ordering. Not able to say any more until part is fitted and see how it works!” — Eddie M.

Mercedes-Benz 9G-Tronic Mechatronic replacement

12-month warranty2–5 day turnaroundTracked return deliveryData transfer included

A brand-new Mercedes-Benz 9G-Tronic Mechatronic. All replacement units are supplied on an exchange basis: every unit is tested before dispatch and the price includes data transfer, so your original must be sent in for us to copy its coding and adaptation data onto the new unit, and it stays with us as the exchange. Replacement units carry a 12-month warranty and normally leave us within 2–5 working days.
Prefer it fitted? Choose Replacement & Fitting and call 01884 798090 to book a slot at our workshop in Uffculme, Devon — we fit the replacement, carry out the data transfer and road-test the car, usually the same day.

Mechatronic units need basic settings and clutch adaptation with a diagnostic tool once refitted. Any competent transmission specialist can do it; we tell you exactly what is needed with the unit.

Not sure the mechatronic is the cause? The symptoms and the fault codes we see on this unit are listed under Common Faults. If your codes differ, send them over before ordering — if the unit turns out not to be faulty you only pay the test fee and return postage.

Which vehicles does this mechatronic fit?

This unit is used across Mercedes. Check your exact model and year under Matching Vehicles, or compare the number printed on your own unit with the part numbers listed on this page. The same hardware often appears under several part numbers — call 01884 798090 if yours is not shown.

Prefer not to remove the unit yourself?

Choose Replacement & Fitting and call 01884 798090 to book a slot at our workshop in Uffculme, Devon. We fit the replacement unit, carry out the data transfer and road-test the car before you drive away, usually the same day; your original stays with us as the exchange.

Frequently asked questions

Do I still have to send my old unit in?

Yes. All replacement units are supplied on an exchange basis and have to be matched to your car: your original is needed for the data transfer — we copy its coding and adaptation data onto the new unit before it ships — and it stays with us as the exchange.

How long will I be without the unit?

Replacement units normally leave us within 2–5 working days of receiving your original. Should it take longer, we will contact you with an update. It comes to you on a tracked service. Ask about on-site fitting if you need the car back the same day.

My part number isn’t in the list — can you still help?

Usually yes. The same hardware appears under many part numbers. Send us a photo of the label or call 01884 798090 and we’ll confirm before you send anything.

What warranty do I get?

Replacement units carry a 12-month warranty. See Returns & Warranty for the full terms.

Does it need setting up after fitting?

Yes — basic settings and clutch adaptation have to be carried out with a diagnostic tool once the unit is back in the car. Fresh transmission fluid and a filter are strongly recommended at the same time.

Common Faults

What are the symptoms of a failing Mercedes-Benz 9G-Tronic Mechatronic mechatronic?

Jerking or slipping under load
Clutch adaptation failing after a service
Refusing to select a gear once the gearbox is hot
Pressure or solenoid fault codes stored in the transmission module
Gearbox dropping into limp mode
The selector position automatically shifts from D to N.
There is a failure to select D.

Different symptoms or fault codes – or no codes at all? Call 01884 798090 or use our contact form. We’ll help assess the issue before you send your unit.

Matching Vehicles

Make	Model	Years
Mercedes	C-Class	W205 (2014-2021)W206 (2021-present)
Mercedes	CLS-Class	C257 (2018-present)
Mercedes	E-Class	W213 (2016-present)W214 (2023-present)
Mercedes	GLC-Class	X253 (2015-2022)X254 (2022-present)
Mercedes	GLE-Class	W166 (2015-2019)W167 (2019-present)
Mercedes	GLS-Class	X166 (2015-present)X167 (2019-present)
Mercedes	S-Class	W222 (2013-2020)W223 (2020-present)
Mercedes	SL-Class	R232 (2022-present)
Mercedes	SLC	R173 (2016-present)

How It Works

Repair by post 2–5 working days

Step 1

Order online

Add the service to your basket. We ask for your vehicle details and fault codes – no separate repair form.
Step 2

Send us your unit

Pack it securely and post it with the free UK shipping label – or ask us to arrange a collection.
Step 3

We test & repair

Every unit is tested first, then repaired within 2–5 working days. Not faulty? You only pay the test fee and postage.
Step 4

Back to you, tracked

Returned by DHL Express or DPD. Pay at checkout or choose Pay After Repair.

On-site fitting

Prefer on-site fitting?

Bring the vehicle to our workshop in Uffculme, Devon. We remove, repair and refit the unit while you wait (about 2–3 hours), road-test the car and you pay on collection.

Call to book

More details: How to order Delivery pricing Returns & warranty

9am - 5pm

Mercedes-Benz 9G-Tronic Mechatronic Replacement Unit

Mercedes-Benz 9G-Tronic Mechatronic replacement