Front Suspension Specifications (Mercedes-Benz S-Class W116)

Installing front suspension springs (rubber front spring mounts)

Front suspension spring rubber mounts:

height 8 mm - part no. 115 321 4884
height 13 mm - part no. 115 321 4984
height 18 mm - part no. 115 321 5084
height 23 mm - part no. 115 321 5184

Installing rear suspension springs (rubber rear spring mounts)

Rubber mounts for rear suspension springs:

height 9.5 mm - part no. 115 325 2244
height 14.0 mm - part no. 115 325 2344
height 19.0 mm - part no. 115 325 2444

Permissible spring - shock absorber combinations

Data for checking the shock absorber

Data for checking springs

Level control

Adjustment of the outlet valve to limit the pressure in the hydraulic system - 30 + 6 bar

Adjusting the safety valve:

minimum pressure - 120 bar
maximum pressure - 160 bar

Level control connecting rod

Spring energy accumulator (all models)

Gas pressure:

nominal - 23±2 bar
minimum - 15 bar

Oil pump MB or Tevers DPK 4/1

Gear ratio (engine/hydraulic system pump):

280 S and 280 SE - 2:1
350 SE and 450 SE - 2:1

Speed of rotation when checking pump performance*

280S and 280 SE - 200 rpm
350SE and 450 SE - 1650 rpm

Pump performance (all models)

without and with compression - 0.75 l/min

Front suspension

Front wheel hub:

diameter of the circle for the brake disc mounting bolts - 104.0 mm
wheel rim mounting bolt circle diameter - 112.0 mm
flange diameter for installing brake disc - 79.97-80.00 mm
permissible flange runout - 0.03 mm
permissible radial runout of the flange seating surface - 0.05 mm

Lubricants:

for hub and cap multipurpose or bearing grease quantity of grease:

total - 60 g
in the hub with bearings - 45 g
in the hub cap - 15 g

Front wheel bearing clearances:

Axial clearance in the front wheel hub - 0.01...0.02 mm

Axial clearance tester - 136 589 0421 or 116 589 1212 00 and dial indicator

Front suspension ball joints:

Upper and lower pivot pin joints

Grease - Long lasting grease
Amount of grease - 5 - 6 g

Checking the condition of the hinges

There should be no gap between the ball pin and the joint housing; the ball pin should rotate relative to the housing without jamming or creaking.

Check the integrity of the protective cover.

Front suspension strut gaps:

Measure the wheel rim clearance (at the bottom of the rim flange). To check, place a stand under the lower wishbone.

Front wheel support:

new car - 0.03 mm
permissible wear limit - 0.10 mm

Steering knuckle bearings: no gaps in the ball joints both when the car is new and after a long run

Suspension wishbone bearings: no gaps in the rubber-to-metal hinges of the wishbones after long mileage