Expert Mercedes-Benz GLS transmission service in Chicago. Diagnosis-first inspection, Written warranty terms on rebuilds, all years.
We will contact you as soon as a service member is available by call, text, or email.
X166 GL-Class (2013 - 2016) / GLS (2017 - 2019): 7G-Tronic (722.9) 7-speed. X167 GLS (2020+): 9G-Tronic nine-speed automatic. AMG GLS 63: 4MATIC+ with AMG-specific 9G-Tronic tuning. 4MATIC AWD on all GLS models.
GLS conductor plate and valve body repairs follow identical procedures to S-Class and GLE. The X166/X167 4MATIC transfer case seal leaks should be addressed concurrently with transmission work - the transfer case fluid and transmission fluid are independent but both critical.
722.9: MB 236.14/236.15. 9G-Tronic: MB 236.17. Transfer case: MB 235.0 fluid. Change every 40,000 miles.
Conductor plate: 1 - 2 days. Full rebuild: 4 - 5 days. Transfer case seal: 1 day.
Fluid service and inspection complete the same day. Solenoid or sensor replacement: 1 day. Torque converter or seal repair: 2 - 3 days. Full rebuild with road test: 4 - 6 days. Time estimates assume parts in stock - call (312) 626-8759 to verify availability for your specific vehicle.
Every vehicle needs diagnosis before anyone can promise a repair path. These are the situations we help organize before you decide what to do next.
Tell us when it happens, whether reverse still works, and if warning lights are on. A scan and fluid check come before guessing at a rebuild.
Fluid condition, leak location, and driving distance matter. If the vehicle is slipping badly or overheating, towing may be the safer next step.
A failed solenoid, valve body, converter, or internal clutch problem can lead to very different repair paths. The goal is a clear diagnosis and written estimate.
Yes - same 722.9 or 9G-Tronic depending on year, same conductor plate vulnerability, same repairs.
Usually the transfer case seal or 4MATIC module - not the main transmission. We'll diagnose both.
$900 - 1,500 at Chicago Transmission vs. $2,000 - 3,500 at a Mercedes dealer.
More complex than 7G-Tronic, same fluid maintenance requirements. Change MB 236.17 every 40,000 miles.
AMG models run higher temperatures by design. A transmission temperature warning during sustained spirited use could indicate fluid degradation or cooling system issue - get a diagnostic.
Appointments scheduled based on availability. Honest estimates, no surprises. We've been doing this Serving Chicago drivers.
