Replaces the failed conductor plate in a Mercedes 722.6 five-speed and includes the connector plug, gasket, filter and pan gasket.
A Mercedes C-, E-, CLK- or ML-Class with the five-speed automatic that starts in second, refuses to upshift and lights the check engine lamp is usually telling you the conductor plate has failed. This kit is built for the Mercedes 722.6 and contains everything that has to be replaced once the pan is off: the conductor plate, the 13-pin connector plug, the connector gasket, a new filter and a pan gasket. It cross-references OEM numbers 1402701161, 1402700861, 1402700561, 1402770095, 1402710080, 2035400253, 2035400153, 2035400053 and 1402700250 (manufacturer number TC1161).
Mercedes put the whole electrical side of the 722.6 on one plate clipped to the valve body. It carries the N2 and N3 Hall-effect speed sensors, the contacts for the three shift solenoids and the three pressure modulating solenoids, the fluid temperature sensor, and the reed switch that tells the starter circuit the selector is in park or neutral. The temperature sensor and reed switch are wired in series, so the module only reads true fluid temperature in drive or reverse. When the plate cracks or its contacts corrode, the control unit loses speed or solenoid feedback and puts the car into limp-home mode.
Read the codes with a Mercedes-capable scan tool first. Then unplug the 13-pin connector at the case: if oil runs out of it, the plug and its seals have been leaking and must be replaced along with the plate, which is why both come in this kit. A dark, burned-smelling fluid or a pan full of clutch material means the problem is mechanical as well. Flares on the 2-3 or 4-5 shift with no codes point at worn valve body bores instead, covered in our 722.6 valve body symptoms and testing guide. Model-specific write-ups are in 722.6 E-Class common problems and 722.6 C-Class shift problems.
This kit is for Mercedes-Benz models with the 722.6 five-speed automatic. The 722.6 went through several conductor plate revisions during its production run, so read the number stamped on your old plate and match it to the OEM list above before ordering. It does not fit the 722.9 seven-speed. If you are not sure which transmission you have, send us the year and VIN and we will check. All of our parts for this family are on the 722.6 and 722.9 parts page.
A 722.6 drain and fill kit makes the refill easier. If the bores are worn too, a complete 722.6 valve body with solenoids covers both faults in one job.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The conductor plate, the 13-pin connector plug, the connector gasket, a transmission filter and a pan gasket. Solenoids are not included; you move your existing ones over.
Models with the 722.6 five-speed automatic. Match the number on your old plate to the OEM list, because the plate was revised over the years, or send us your year and VIN.
Its seals are a common leak point. ATF that wicks up the plug and harness causes the same limp-mode codes as a cracked plate, so a new plate on an old, oily plug can fail again.
Mercedes approves only 236.14 fluid for the 722.6, sold under part number A001 989 68 03 10. Do not mix in 236.15 or 236.16.
Use a 722.6 service dipstick through the fill tube with the engine idling, the selector in drive or reverse and the fluid at 80 degrees C, then fill to the upper mark.
Yes. Clear codes and reset the adaptation values with a scan tool, then road test so the shifts relearn with the new plate.
