Wheel torque specs
#1
Member
Thread Starter
Wheel torque specs
Just want to make sure I didn't miss anything. The manual says 96 ft lbs of torque for wheel lug nuts. I assume this is for C43 as well, not just C 300. Just want to double check I'm not missing anything.
Thanks!
Thanks!
#3
Member
Thread Starter
#4
MBWorld Fanatic!
Actually wheel lug bolts (not nuts) torque is hardware (wheels and lug bolts) specific rather than model specific. If car is supplied from the factory with wheels requiring "short" 14x1.5x27mm bolts (i.e.: W212 E, C218 CLS, R231 SL to name a few), the torque is 96 ft lbs, but if car is supplied from the factory with wheels requiring "long" 14x1.5x45mm bolts (i.e.: all SUVs - ML/GLE/GL/GLS/GLC etc, all S class as well as new W213 E and C257 CLS) the torque is 110 (111) ft lbs. Never had C, so do not know what wheels/bolts MB supplies (but as I recall W204 had 27mm bolts).
#5
Member
Thread Starter
Actually wheel lug bolts (not nuts) torque is hardware (wheels and lug bolts) specific rather than model specific. If car is supplied from the factory with wheels requiring "short" 14x1.5x27mm bolts (i.e.: W212 E, C218 CLS, R231 SL to name a few), the torque is 96 ft lbs, but if car is supplied from the factory with wheels requiring "long" 14x1.5x45mm bolts (i.e.: all SUVs - ML/GLE/GL/GLS/GLC etc, all S class as well as new W213 E and C257 CLS) the torque is 110 (111) ft lbs. Never had C, so do not know what wheels/bolts MB supplies (but as I recall W204 had 27mm bolts).
#6
Super Member
Actually wheel lug bolts (not nuts) torque is hardware (wheels and lug bolts) specific rather than model specific. If car is supplied from the factory with wheels requiring "short" 14x1.5x27mm bolts (i.e.: W212 E, C218 CLS, R231 SL to name a few), the torque is 96 ft lbs, but if car is supplied from the factory with wheels requiring "long" 14x1.5x45mm bolts (i.e.: all SUVs - ML/GLE/GL/GLS/GLC etc, all S class as well as new W213 E and C257 CLS) the torque is 110 (111) ft lbs. Never had C, so do not know what wheels/bolts MB supplies (but as I recall W204 had 27mm bolts).
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#10
Super Member
This is with standard stainless steel bolts with an 8.8 ISO property grade, can go up with even higher grade materials.
Mercedes-Benz official wheel torque installations are more complex with a torque, angle, torque procedure, therefore, hitting 150Nm is very well possible.
I will follow the instructions designed by the manufacturer, for our exact car and year model, along with industry professional calculations when it comes to torque ratings. No offence!
#11
MBWorld Fanatic!
As I've said before, all MB models with 27mm bolts I had before - W211 E, W212 E, W218 CLS, R231 SL - all had 96 specified in the manual. All MB SUV and sedans with 45mm bolts I had - W166 ML/GLE, X253 GLC, W213 E - all had 110/111 specified in the manual. Why would MB spec W205 C coupe with 27mm bolts with 111 ft lbs is a mystery to me. Using what manual says is fine, and if yours states 111, then use it. Obviously OP's manual for W205 C (assume sedan) states 96.
#12
Super Member
As I've said before, all MB models with 27mm bolts I had before - W211 E, W212 E, W218 CLS, R231 SL - all had 96 specified in the manual. All MB SUV and sedans with 45mm bolts I had - W166 ML/GLE, X253 GLC, W213 E - all had 110/111 specified in the manual. Why would MB spec W205 C coupe with 27mm bolts with 111 ft lbs is a mystery to me. Using what manual says is fine, and if yours states 111, then use it. Obviously OP's manual for W205 C (assume sedan) states 96.
#13
Junior Member
With spacers I have a 45mm bolts on my c43 in the rear and not the stock 27mm. So should I take then to 111 and leave the front 96 since I don't have spacers in the front and still using the stock 27mm bolts?
#14
MBWorld Fanatic!
For example:
R231 SL class (which I had) was/is equipped with 27mm bolts from the factory, and for all SL cars from 2013 to 2020 MY run, 96 is to be used;
W212 E 2010-2015 (which I had), MB used 27mm bolts - 96 torque, but for W213 E 2016-current (which I had), MB switched to 45mm bolts - 110/111 torque.
If you look at factory 45mm lug bolt, you will understand why MB's spec is 110/111. All MB cars I've see, and I've seen quite a few, 27mm factory bolts - 96, 45mm factory bolts - 110/111. All SUVs and S/CL class use 45mm bolts - 110/111 torque, all others that use/used 27 mm bolts - 96 torque.
#15
MBWorld Fanatic!
No, you should continue to use 96 torque no matter how thick your spacers are and or long your bolts are, because your car was delivered from the factory with 27mm bolts calling for torque of 96. Length to torque matters only in reference to factory bolts, since all components are design to handle 110/111 ft lbs torque.
#17
Member
Thread Starter
For reference my C43 is a 2021. I just looked at the manual that came with the car (the one that came in the glovebox, not online) . The manual says 96 lb-ft as the tightening torque. I also checked the supplemental AMG guide and it says nothing about wheel torque specs.
#18
Super Member
For reference my C43 is a 2021. I just looked at the manual that came with the car (the one that came in the glovebox, not online) . The manual says 96 lb-ft as the tightening torque. I also checked the supplemental AMG guide and it says nothing about wheel torque specs.
#19
MBWorld Fanatic!
What I said is that all MB vehicles equipped from factory with 27mm bolts have 96 torque spec, while all those with 45mm - 110/111. There are no MB cars to my knowledge with 110/111 torque spec when originally equipped with 27mm bolts.
#20
Super Member
A halfhearted acknowledgment of calling my posts wrong. I never said that ANY 27mm to use 96 or ANY 45mm 110/111. I never said nor implied length of bolts affects clamping force either.
What I said is that all MB vehicles equipped from factory with 27mm bolts have 96 torque spec, while all those with 45mm - 110/111. There are no MB cars to my knowledge with 110/111 torque spec when originally equipped with 27mm bolts.
What I said is that all MB vehicles equipped from factory with 27mm bolts have 96 torque spec, while all those with 45mm - 110/111. There are no MB cars to my knowledge with 110/111 torque spec when originally equipped with 27mm bolts.
Maybe they made some engineering changes for some values of the facelifted models that brought the torque spec back down to 96 ft-lb, maybe they just made an error in printing out 111 ft-lb for my 2018. I don't know.
But as you acknowledged yourself, length does not affect clamping force so whether 27 or 45mm bolts should be torqued the to the same amount. I don't regret anything I have said.
#21
Member
Thread Starter
Sorry, but this thread has confused me. I haven't removed the bolts for my wheels yet, but I can assume they're 27mm in length. With that being said, the wheels I bought were OEM 19" wheels on the 2019 C43. This is what they look likehttps://ed-parts.com/product/43-amg-...mercedes-benz/ With that being said, my question is would these wheels take the 27mm bolts or 45mm bolts or do all C43's, regardless of wheels come with 27mm bolts on OEM wheels, hence have a torque spec of 96 lb-ft?
#22
Sorry, but this thread has confused me. I haven't removed the bolts for my wheels yet, but I can assume they're 27mm in length. With that being said, the wheels I bought were OEM 19" wheels on the 2019 C43. This is what they look likehttps://ed-parts.com/product/43-amg-...mercedes-benz/ With that being said, my question is would these wheels take the 27mm bolts or 45mm bolts or do all C43's, regardless of wheels come with 27mm bolts on OEM wheels, hence have a torque spec of 96 lb-ft?
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ctsvette (02-02-2021)
#24
Junior Member
Strange, I had no idea the torque setting is different between a 2019 C Class Wagon at 111 ft-lbs, and a 2019 C Class Sedan at 96 ft-lbs. The wheel options are similar and GVWR can't be that different.
Looking into more years, i think it may be an anomaly as both the 2020 and 2021 wagon manuals are back to 96 lb-ft
2019 Wagon owners manual (page 364): https://www.mercedes-benz.ca/content...n_Operator.pdf
2020 Wagon (page 422): https://www.mercedes-benz.ca/content/dam/mb-nafta/ca/owners/operators-manual/2020/operators-manual/MY20_C-Class-Wagon_OM_EN.pdf
2021 (page (page 390): https://www.mercedes-benz.ca/content...+COMAND_EN.pdf
Looking into more years, i think it may be an anomaly as both the 2020 and 2021 wagon manuals are back to 96 lb-ft
2019 Wagon owners manual (page 364): https://www.mercedes-benz.ca/content...n_Operator.pdf
2020 Wagon (page 422): https://www.mercedes-benz.ca/content/dam/mb-nafta/ca/owners/operators-manual/2020/operators-manual/MY20_C-Class-Wagon_OM_EN.pdf
2021 (page (page 390): https://www.mercedes-benz.ca/content...+COMAND_EN.pdf
#25
Newbie