Survey of Locking Nuts (Chassis / Body, Seat Mounting)
 Tighten (Torque)
|
Position |
|
Nm |
|
Chassis |
|
|
1 and 2 |
Front axle to side member |
90 1) 2) |
|
3 |
Front axle to front floor support |
90 1) 2) |
|
4 |
Front axle to side member Front underbody |
90 1) 2) |
|
5 |
Rear axle to car jack support |
90 3) 2) |
|
6 |
Rear axle to car jack support |
90 3) 2) |
|
7 |
Rear axle to side member |
90 4) 2) |
|
Front seat to floor |
|
|
8 |
Front seats to vehicle floor |
20 |
1) 45 ° +15 ° (tighten in 2 steps) 2) Use new bolts 3) 30 ° +15 ° (tighten in 2 steps) 4) 60 ° +15 ° (tighten in 2 steps) | 
|
Replacement Locking Nuts (Accessible Areas with Assembly Opening) Example: Position 2 Front axle body to underbody. Access through opening present in side member.
 Remove, Disconnect Remove bolt. Remove locking nuts through opening using welding rod (8). Pos. 5 and 6: additionally split plastic rings with screwdriver or small chisel (9).
 Install, Connect Use new clamping nuts "without plastic rings (only installed at the factory)". Screw in bolt. The locking nuts in positions 1 and 4 can be replaced during the same operation. | 
|
Replacement Locking Nuts (Inaccessible Areas) Regarding Position 3: Front Axle Body to Underbody. At centring points provided in the front floor (arrows - remove insulating material if necessary), drill Ø 34 mm bore, deburr, remove swarf, apply corrosion protection.
Remove, Disconnect Split plastic ring with screwdriver or small chisel. Remove nut with welding rod or long-nose pliers.
Install, Connect Introduce new locking nuts "without plastic rings". Screw in bolt. Close off bore with Closure Cap 90 061 774 / 01 84 694 and seal with sprayable seam seal. | 
|
Regarding Position 7: Rear Axle Body to Underbody. Position 7 at front in direction of travel (I): starting from centring point provided (I), mount centre punch (arrow) 6 mm to the front in direction of travel and 5 mm to the respective vehicle outer side, drill Ø 34 mm bore, deburr, remove swarf, apply anti-corrosion protection. Position 7 at rear in direction of travel (II): starting from centring point provided (II), mount centre punch (arrow) 25 mm to the rear in direction of travel and 5 mm to the respective vehicle outer side, drill Ø 34 mm bore, deburr, remove swarf, apply anti-corrosion protection. | 
|
Remove, Disconnect Split plastic ring with screwdriver or small chisel. Remove nut with welding rod or long-nose pliers.
Install, Connect Introduce new locking nuts "without plastic rings". Screw in bolt. Close off bore with Closure Cap 90 061 774 / 01 84 694 and seal with sprayable seam seal. | 
|
Replacement Seat Mounting Locking Nuts Regarding position 8: Front Seat, Rear, at Vehicle Floor Centre. At centring point provided (arrows), drill Ø 26 mm bore, deburr, remove swarf, apply corrosion protection.
Remove, Disconnect Bend up cage retainers. Push nut out of cage and remove.
Install, Connect Insert new locking nuts using long-nose pliers and secure. | 
|
Install, Connect Screw in bolt - torque 20 Nm / 15 lbf. ft. Cement bore with hand-finished sheet-metal cover (45 x 40 x 1 mm, metal sheet galvanised on both sides) and 2-component adhesive (from the corrosion protection adhesive sealing system Part No. 90 513 298 / Catalogue No. 15 05 002) and mount with two blind rivets at the side. Coat riveted sheet-metal cover with 2-component adhesive.
Subject: Seat Mounting, Front, Door Side
Remove, Disconnect Remove front seat. Centre-punch fastening point on door side with centre-punch from vehicle interior through the tapped hole on vehicle underbody. Drill Ø 26 mm bore at centre-punch mark on vehicle underbody (arrows), deburr, remove swarf, apply corrosion protection. Bend up cage retainers. Push nut out of cage and remove. | 
|
Install, Connect Insert new locking nuts using long-nose pliers and secure. Screw in bolt - torque 20 Nm / 15 lbf. ft. Cement bore with hand-finished sheet-metal cover (45 x 40 x 1 mm, metal sheet galvanised on both sides) and 2-component adhesive (from the corrosion protection adhesive sealing system Part No. 90 513 298 / Catalogue No. 15 05 002) and mount with two blind rivets at the side. Coat riveted sheet-metal cover with 2-component adhesive.
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