Mercedes-Benz 7G-Tronic 722.9 TCU Repair VGS3 (A0034460310)

SKU TRA9131

24-month warranty
Transmission Control Unit
Part No: A 003 446 03 10
Fits Mercedes-Benz models
Restores transmission functionality

From £239.00

Fast Turnaround 2-5 working days

Warranty Protection Covering all our repairs

Choose your service

Repair Service (by post) Send us your unit — we repair and return it. Add to order and complete the quick vehicle form; free UK shipping label included. Send us your unit. We repair & return it. Free UK shipping label. £239.00 (Excl. 20% VAT)

Repair & Fitting (on-site) On-site removal & refit by our technician. Booked by phone only — call 01884 798090. Not available to order online. We remove, repair & refit the unit while you wait. Call 01884 798090 £639.00 (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 7G-Tronic 722.9 TCU VGS3 repair

24-month warranty2–5 day turnaroundTracked return deliveryNo coding needed

We repair the Mercedes-Benz 7G-Tronic 722.9 TCU VGS3. Listed under part number A0034460310. Send us your original unit, we replace the failed components on the board and return the same unit, so it keeps the coding and security data already matched to your car and needs no programming (24-month warranty). Repairs usually turn round in 2–5 working days.
Prefer it fitted? Choose Repair & Fitting and call 01884 798090 to book a slot at our workshop in Uffculme, Devon — we remove the unit, repair it, refit it and road-test the car, usually the same day.

Not sure the TCU 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 TCU 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 Repair & Fitting and call 01884 798090 to book a slot at our workshop in Uffculme, Devon. We remove the unit, repair it and refit it, then road-test the car before you drive away, usually the same day.

Frequently asked questions

Do I get my own unit back?

Yes. This is a repair, not an exchange — we repair and return your original unit, so it keeps the coding and security data already matched to your car and needs no programming afterwards.

How long will I be without the unit?

We aim to complete all repairs within 2–5 working days. Should a repair take longer, we will contact you with an update. It goes back 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?

Repairs carry a 24-month warranty. See Returns & Warranty for the full terms.

Will the warning light go out after the work?

Yes, once the unit is refitted and the stored codes are cleared, provided the fault was in this unit. If a related wiring or sensor fault is also present it has to be fixed separately — we tell you what we found.

Common Faults

What are the symptoms of a failing Mercedes-Benz 7G-Tronic 722.9 TCU VGS3 TCU?

Harsh, jerky or delayed gear changes
Gearbox dropping into limp mode, or a complete loss of drive
Flashing gear indicator on the instrument cluster
A “gearbox malfunction” warning on the dash
No response when selecting D or R
Gearbox goes into limp home mode
Stuck in gear or holding in gear, unable to select any gear
Intermittently not changing gear

Common fault codes

Fault code	Meaning
P0715	Input/Turbine Speed Sensor Circuit Malfunction
P0716	Input / Turbine Speed Sensor Circuit Malfunction / Range Performance / No Signal / Intermittent
P0717	Input / Turbine Speed Sensor Circuit No Signal
P0718	Input / Turbine Speed Sensor Circuit Intermittent
P0717	2204 – The signal from component Y3 / 8n1 (turbine speed sensor (VGS) is unavailable
P0718	2205 – The component Y3 / 8n1 (turbine speed sensor (VGS) is defective
P0719	Torque Converter Brake Switch Circuit Low
P0720	Output Speed Sensor Circuit Malfunction
P0721	Output Speed Sensor Range/Performance
P0722	Output Speed Sensor No Signal
P0723	Output Speed Sensor Intermittent
P2766	Input / Turbine Speed Sensor Y3/8n2 Circuit Range / Performance
P2767	The signal from component Y3 / 8n2 (Internal speed sensor (VGS) is unavailable
P2768	The component Y3 / 8n2 (Internal speed sensor (VGS) is defective
2201	the component Y3/8n2 (internal speed sensor)
P0705	Transmission range sensor fault

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	W203 (2000-2008)W204 (2007-2015)
Mercedes	CL-Class	W216 (2006-2014)
Mercedes	CLK-Class	W209 (2002-2010)
Mercedes	CLS-Class	W219 (2004-2010)
Mercedes	E-Class	W211 (2002-2010)W212 (2009-2017)
Mercedes	GL-Class	X164 (2006-2012)X166 (2012-2015)
Mercedes	M-Class	W164 (2005-2011)W166 (2011-2015)
Mercedes	R-Class	W251 (2005-2013)
Mercedes	S-Class	W221 (2005-2013)
Mercedes	SL-Class	R230 (2001-2012)
Mercedes	SLK	R171 (2004-2011)R172 (2011-2016)
Mercedes	Sprinter	2nd gen (2006-2018)
Mercedes	Viano	W639 (2003-2014)

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 7G-Tronic 722.9 TCU Repair VGS3 (A0034460310)