S 500 Sedan (140.051) V8-5.0L (119.970) (1994)
Steering Gear: Technical Service Bulletins
Steering Box - Revised Tightening Torque
TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS
Date: January 1992
Ref. No. 46/73
Subject:
MODEL 140
REVISED TIGHTENING TORQUE OF STEERING BOX
The tightening torque for the steering box on models 140, as described on page 350 of the Model Year 1992 (USA) Model 140 Preliminary Introduction
Manual, has been revised from 100 Nm to 50 Nm with a tightening angle of 90 °.
In addition, maintenance job 4671, performed during the Inspection Service and Additional Work every 30,000 miles, no longer applies to models 140.
Please correct your copies of the M-B Maintenance System sheet for Model Years 1986-1992 as follows
4671
Steering box,
Except Model 140
In case of repair, the three M12 locking hex. bolts must be replaced. The thread surface and mating surface must be free of oil, grease and wax. Also, the
bolts may not be retightened due to the microencapsulation material which coats the original threads.