TechWhiz Posted January 13 Share Posted January 13 Greetings to everybody; I hope everyone is in good health. I get a pronounced clunking sound while transitioning from park to reverse. This issue occurs just while transitioning from park to reverse and exclusively when the vehicle is positioned on an incline. Is there a solution? 2011 Mercedes C-Class SE CDI BlueEfficiency Facelift with 7G-Tronic Plus transmission Thank you. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted January 13 Share Posted January 13 Is your foot securely positioned on the brake pedal? Have you verified the ATF level? When was the gearbox last maintained? Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted January 13 Author Share Posted January 13 Indeed, I have my foot firmly positioned on the brake pedal. I have not verified the ATF level, nor do I possess any documentation of prior servicing. Quote Link to comment Share on other sites More sharing options...
WordSmith Posted January 13 Share Posted January 13 My husband had this on his Range Rover upon its first acquisition. Resonated in a distinctly mechanical manner. He was instructed, on an uphill, to engage the handbrake and release the foot brake to allow the vehicle to stabilise, then shift into Park. Related to a pin. I will enquire with him. Quote Link to comment Share on other sites More sharing options...
WordSmith Posted January 13 Share Posted January 13 https://www.rrsport.co.uk/forum/topic48346.html Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted January 13 Author Share Posted January 13 Thank you; please inform me. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted January 13 Share Posted January 13 Is the parking pawl disengaging? Quote Link to comment Share on other sites More sharing options...
Matt865 Posted January 13 Share Posted January 13 Hello everyone, may I provide a few ideas? Indeed, the 'parking pawl' is a mechanism that secures the gears from rotation. Many people depend on this mechanism to secure the vehicle while parked on an incline; nevertheless, it was not designed to support the weight of the automobile and may sometimes fail. The proper approach on an incline is to engage the foot brake, activate the parking brake, shift to neutral, release the foot brake to allow the parking brake assembly to take up slack, and then shift to park. Vehicle immobilised with no stress on the parking pawl/pin. It is OK to use Park mode while on a level surface. A 'thump' while shifting gears may indicate that the rubber couplings in the prop shaft have stiffened over time. Replacing these components may resolve the issue; however, it is neither a cost-effective nor straightforward solution, since each unit costs around £40 to £50, and considerable disassembly of the underbelly is necessary for removal and replacement. I will replace these components on my vehicle as part of the rear subframe and suspension arms refurbishment job I am now doing. Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted January 13 Author Share Posted January 13 Thank you for your enlightening comment. I recommend that you take your vehicle to the dealership, since I had a subframe problem that was resolved at no cost due to it being a manufacture flaw. Quote Link to comment Share on other sites More sharing options...
Matt865 Posted January 13 Share Posted January 13 The only issue is that I am now midway through the replacement process (the old rusted subframe has been removed, and the new is partially constructed) and BlackC55 (the Mercedes dealer) has told me that without a comprehensive corrosion inspection history documented in the service book, Mercedes would not consider the matter at all. I believe the subframe problem ought to have been classified as a recall item; but, consider the financial implications for the ostensibly kindly Mercedes that we are familiar with. I will publish some text and images once completion. Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted January 13 Author Share Posted January 13 I apologise, but I lack any history of corrosion checks. Regrettably, you have been deceived. One need to have considered an other dealership. I had just a partial service history, although the dealership failed to verify it. Quote Link to comment Share on other sites More sharing options...
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