Expert Mercedes-Benz GL-Class transmission service in Chicago. Free computer diagnostic, 2-year / 24,000-mile warranty on rebuilds, all years.
We will contact you as soon as a service member is available by call, text, or email.
GL-Class transmission service follows the same procedures as ML-Class - identical drivetrain platform. The GL is a full-size SUV often used for heavy family and towing duty, making fluid maintenance especially critical.
722.9: MB 236.14/236.15. Change every 40,000 miles.
Verify exact spec on the dipstick label or owner's manual before fill. Recommended change interval: every 60,000 miles for normal driving, 30,000 miles under severe service (towing, stop-and-go, hot climates). Pan service typically takes 6 - 8 quarts; a full fluid exchange takes 10 - 14 quarts depending on cooler-line capacity.
Conductor plate: 1 - 2 days. Full rebuild: 4 days.
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 - identical 722.9 7G-Tronic on same-year models. Same conductor plate vulnerability, same repairs.
722.9 conductor plate failure - accelerated by tow heat. $900 - 1,500 to repair.
Every 30,000 miles for towing applications.
Same 722.9 unit - different torque loading. Diesel GL benefits from more frequent fluid changes.
Can be - air suspension height affects transmission load sensing. Diagnose both systems. Often coincidental failures in high-mileage vehicles.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.
