NORTH 44 C63

Just got a Text from my shop foreman. New Torque spec's on our wheel bolts.

132ft/lbs

Seems high to me but he double checked. Get out the torque wrenches>>

LangeOne

My car is in the shop for the 1,850 mi differential oil change. Should I ask them to check the wheel bolts?

PatSC23

Damn that is high in comparison - im torquing my C63 to 96.

Agent_Oorange

Good thing you posted this, had to deal with a flat yesterday, time to get the torque wrench out.

Faraz

Gents,

Just an FYI, that is not ft/lb --- it's 132/nm, if you have torqued it to ft/lbs, you may really want to revert. 96ft/lb is correct.

-Faraz

Faraz

Incorrect bud, hope you didn't torque that tightly!

It's nm's no service bulletin.

rage2

Look in your manual, page 257. The torque specs for the spare is 133 lb-ft (180 Nm). There's no mention of the factory wheels. I believe that's what the service bulletin is addressing.

NORTH 44 C63

Wrongo Faraz>>> torqued to 133 ft/lbs (180 Nm)

Faraz

Crazy!

I was just at the dealership for this and he looked it up and said it was Nm....

Can you get me the info on this in greater detail ? Where the tech found it etc.

I would like to find out why there is a discrepancy.

Thank you for the follow up, I would like to know what is correct....

-F

NORTH 44 C63

Me too. I will be at the dealer later today>>

1st amg

My brother "Coladin" on this forum can vouch for this, a couple of years ago he had a 2008 G37S and we were doing a winter and summer tire swap on his driveway and I had incorrectly adjusted the torque setting on the torque wrench to 135lb/ft and I snapped a lug nut off his rear wheel....we were in awe, couldnt believe I twisted that metal with a silly miscalculation, so please guys find out for sure....it was a real biatch to get that piece out of the hub.

NORTH 44 C63

Here is a copy of the update:

Faraz

Thanks!

I will have them try and look it up again. Im sure the MFR settings are ok for a while.

Appreciate the info and the pics, North.


-Faraz

Faraz

No go, I asked my dealer again, and showed them picture- they did a lookup and found no SB - they also stated that there should be a service bulletin #.

Im going to leave mine at 96ft/lb until I can get a solid answer


-f

bhamg

A wise decision - I think the likelihood of 132 ft/lbs being the correct torque value is close to zero.

LangeOne

For what it's worth, my service rep worked on my BS this past Tuesday. He confirmed that, for our cars, the correct value is in the 130 lb-ft range. However for the non BS C63, the value is in the 90's.

rage2

The 132 ft-lbs value is specified in the manual on page 257 of the Black Series owners manual.

gthal

So the photo of the MB service document in post #12 isn't enough to convince you? It isn't a service bulletin if you look at it so it likely doesn't have a number. I would place much more relevance to a MB document than the fact that your dealer hasn't heard about it.

otakki

That value sure sounds really high. I wonder why.