Anabroo Posted June 6 Share Posted June 6 Greetings to everybody, Today, I went to get the vehicle's alignment adjusted. However, I had an issue where the car's engine was running at high RPMs but the car was not moving forward. To resolve this, I shifted between reverse and drive a few times, and the problem was resolved for the whole round trip of around 45 miles. I applied sufficient acceleration throughout the journey and the car operated smoothly. After let the vehicle idle for around 5 hours, I attempted to drive it around the block. However, I had the same issue where the car struggles to go forward, similar to the experience of a manual car with a sliding clutch. Although there are no illuminated indicators on the dashboard, my buddy has graciously offered to lend me his diagnostic scanner tomorrow in the expectation that it would reveal any potential issues. However, I am certain that resolving the problem will need the expertise of a professional. Has anybody else experienced this previously? I have made a reservation to go to Germany in a few weeks and I am feeling really anxious. Link to comment Share on other sites More sharing options...
LimeLing Posted June 6 Share Posted June 6 When was the gearbox last maintained? Link to comment Share on other sites More sharing options...
Anabroo Posted June 6 Author Share Posted June 6 The vehicle's service history is not fully documented by Mercedes. It is a 2014 model with 58,000 km on the odometer. I will verify promptly upon my arrival at home. Link to comment Share on other sites More sharing options...
Anabroo Posted June 6 Author Share Posted June 6 Currently examining my records, I have found one entry from 2017 indicating a mileage of 31,000. Additionally, it states that an oil and filter change was performed. My visual perception is limited, thus I believe that there has just been one alteration. Link to comment Share on other sites More sharing options...
LimeLing Posted June 6 Share Posted June 6 I would check the level of oil in the gearbox. Link to comment Share on other sites More sharing options...
Anabroo Posted June 6 Author Share Posted June 6 Indeed, it is much delayed. I had mistakenly believed that it had been completed not too long ago. I have just purchased an authentic repair kit that includes new bolts. I will do some research to get the appropriate torque values. Link to comment Share on other sites More sharing options...
LimeLing Posted June 6 Share Posted June 6 I did not want to do a full service on it, but rather to only inspect the oil level. To do so, you will need to purchase a dipstick and a new red cap. Link to comment Share on other sites More sharing options...
Jollyno Posted June 6 Share Posted June 6 The gearbox model is 722.9, which does not have a dipstick. Link to comment Share on other sites More sharing options...
AmericaMonster Posted June 6 Share Posted June 6 https://mbworld.org/forums/c-class-w203/365242-diy-722-9-7g-tronic-7-speed-automatic-transmission-service-thread.html Link to comment Share on other sites More sharing options...
Darthilli Posted June 6 Share Posted June 6 I recommend deferring the use of the servicing kit until you have verified the oil level. I would also ensure that you thoroughly examine the trouble codes by using a diagnostic tool capable of reading all the gearbox codes comprehensively. Possibly due to insufficient oil, however there seems to be an issue with the MCT (torque converter replacement) in my opinion. Link to comment Share on other sites More sharing options...
AmericaMonster Posted June 6 Share Posted June 6 https://www.fcpeuro.com/blog/the-definitive-guide-to-the-mercedes-722-9-7g-tronic-transmission#:~:text=The Mercedes-Benz 722.9 Transmission At A Glance Seven,points%2C sets off in second gear%2C fully automatic). Link to comment Share on other sites More sharing options...
AmericaMonster Posted June 6 Share Posted June 6 https://www.fcpeuro.com/blog/mercedes-7-speed-transmission-service-walkthrough-722.9-transmissions Link to comment Share on other sites More sharing options...
LimeLing Posted June 6 Share Posted June 6 That is the reason I suggested that you should get one. Link to comment Share on other sites More sharing options...
Jollyno Posted June 6 Share Posted June 6 Laughing out loud! I will be pleased if you can locate a tube to insert into a 722.9. Link to comment Share on other sites More sharing options...
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