9G-Tronic (725.0) Gearbox

Typical faults: error P073E00 P07B700 P17F000 P07E400 P17F800

The TCU 725.0 9G-tronic The gearbox is a technologically advanced 9-speed automatic transmission, widely used in Mercedes-Benz cars produced after 2015. It is characterized by smooth operation, fuel economy, and driving comfort – but like any modern gearbox, it is not free from malfunctions.

We offer professional repair of 9G-Tronic gearbox control unit.

Our experienced team of specialists performs the service using the latest tools and genuine spare parts. Trust us and enjoy safe driving. We offer professional repairs of the 9G-Tronic transmission controller. We work effectively, quickly, and with a warranty.

Which Mercedes models are equipped with the 9G-Tronic transmission? The 725.0 transmission was (and still is) installed in many popular Mercedes models, including:

• 9G-Tronic Mercedes C-Class (W205)
• 9G-Tronic Mercedes C-Class (W206)
• 9G-Tronic Mercedes E-Class (W213)
• 9G-Tronic Mercedes S-Class (W222)
• 9G-Tronic Mercedes GLC (X253)
• 9G-Tronic Mercedes GLE (W167)
• 9G-Tronic Mercedes GLS (X167)
• 9G-Tronic Mercedes Vito Tourer
• 9G-Tronic Mercedes V-Class (W447)
• 9G-Tronic Mercedes Sprinter (W907)
• 9G-Tronic Mercedes Sprinter (W910)
• 9G-Tronic Mercedes CLA, A, B, GLA – in rear-wheel drive versions

Typical symptoms of damage to the 9G-Tronic gearbox

If you have a Mercedes with this gearbox and notice the following symptoms, it is worth having it diagnosed as soon as possible:

• Shocks when driving off or shifting gears
• Delayed response when switching from P/N to D/R
• The gearbox automatically shifts back from "D" to "N" after stopping (e.g. at an intersection)
• After the first use of the selector lever, "D" does not engage - you will have to try several times
• When you manage to shift into gear, the gearbox will start from "D3" instead of "D1"
• problems engaging reverse gear (R)
• Emergency mode is activated (indicated by "F" on the clocks)
• Unable to drive despite the gear apparently being engaged

Common faults in the 9G-Tronic gearbox (TCU controller)
During computer diagnostics, errors are often recorded in the transmission control module (TCU).

The most common mistakes are:

P07B700 – The pressure sensor signal is invalid
P17F800 – Gearbox adjustment is not correct
P17F000 – Gear cannot be learned
P073E00 – Reverse gear will not engage
P07E400 – P-mode does not engage

All of these errors could indicate problems with:

• oil pressure sensors in mechatronics,
• damaged control valves,
• errors in the adjustment of the gearbox,
• a contaminated hydraulic system or used ATF oil.

Oil change in the 9G-Tronic – when?

Despite the oil's stated "lifetime" lifespan, we recommend changing it dynamically after 60,000 to 80,000 km. Contaminated oil and metal filings clog the hydraulic channels over time and lead to expensive mechatronic failures.

Why is it worth repairing with us?

• We repair instead of replacing - saving you up to thousands of euros
• Repair time 1-3 days
• Experience with repairs of TCU electronics
• Access to professional diagnostic and testing equipment
• Environmentally friendly – ​​regeneration instead of producing a new part
• Invoice and warranty

Contact us

If you notice such symptoms in your Mercedes, this is a clear signal that the TCU system or the mechatronics 725.0 9G-tronic needs to be intervened.

Don't wait any longer, because driving with a damaged gearbox can lead to more serious and expensive breakdowns.