Mercedes-Benz A-Class lug nut torque

The Mercedes-Benz A-Class takes 96 lb-ft (130 N·m) on its wheel bolts; the manuals for cars built 2018–2021 all say the same. Tighten them in a star pattern with a torque wrench.

Sources checked

Wheel bolt torque

96lb-ft130N·m

04080120050100150ft-lbN·m
As printed
“Tighten the wheel bolts evenly in a diagonal pattern in the order indicated 1 to 5 with the specified tightening torque of 96 lb-ft (130 Nm).”
Source
A-Class Hatch Operator's Manual (W177 MBUX, built from September 2021): Changing a wheel, PDF page 329

Mercedes-Benz A-Class lug nut torque by build date

Built fromVersionTorqueManual page
September 2021Hatch W17796 lb-ft (130 N·m)Changing a wheel, PDF page 329
September 2021Sedan V17796 lb-ft (130 N·m)Changing a wheel, PDF page 324
March 2021Hatch W17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 331
March 2021Sedan V17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 326
September 2020Hatch W17796 lb-ft (130 N·m)Lowering the vehicle, PDF page 305
September 2020Sedan V17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 319
March 2020Hatch W17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 318
March 2020Sedan V17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 312
September 2019Hatch W17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 463
September 2019Sedan V17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 458
March 2019Hatch W17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 464
March 2019Sedan V17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 459
September 2018Hatch W17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 454
July 2018Sedan V17796 lb-ft (130 N·m)Lowering the vehicle after a wheel change, PDF page 450
March 2018Sedan V177130 N·m (96 lb-ft converted)Lowering the vehicle after a wheel change, PDF page 463

A unit marked converted isn’t printed in that manual, or is printed wrongly: it’s worked out from one the manual prints. Mercedes-Benz lists its owner’s manuals by the date the car was built, not by model year, so they’re listed that way here: each applies to cars built from the date shown. The month and year yours was built are on the label in the driver’s door frame. Read on Mercedes-Benz’s own site on October 23, 2026.

How to tighten them

  1. Clean any dirt or rust off the bolts and the wheel’s mounting face. Don’t oil them unless the manual says to.
  2. Thread every bolt in by hand until it seats against the wheel.
  3. Lower the vehicle so the tire takes its weight, and set a torque wrench to 96 lb-ft (130 N·m).
  4. Tighten the bolts in a star pattern, going around two or three times, until the wrench clicks on every bolt.
  5. Check the torque again after a short drive if your manual says to.

What the Mercedes-Benz manual adds

  • Tighten the wheel bolts evenly in a diagonal pattern in the order indicated 1 to 5 with an initial maximum force of 59 lb-ft (80 Nm).
  • Tighten the wheel bolts evenly in a diagonal pattern in the order indicated (1 to 5).
  • Have the tightening torque checked immediately at a qualified specialist workshop after changing a wheel.

More detail, including how many passes to make: how to torque lug nuts. Setting and using the wrench: how to use a click torque wrench. Wheels held on by bolts, and how they’re fitted: lug nuts vs wheel bolts.

Other Mercedes-Benz models

Questions

What is the lug nut torque on a Mercedes-Benz A-Class?

96 lb-ft (130 N·m), from Mercedes-Benz’s owner’s manuals (built 2018–2021).

Can I use an impact wrench?

Not to finish. An impact wrench can’t set a torque and easily overshoots it, which stretches studs. Run the nuts down by hand or lightly, then finish with a torque wrench in a star pattern.

Should I oil the wheel bolts?

Not unless the manual says so. Torque values assume clean, dry threads; oil lets the same torque stretch the bolt further. Some manuals, Kia’s and Mazda’s among them, say to keep oil and grease off wheel nuts and bolts altogether.