300SDL (126.125) L6-3.0L DSL Turbo (603.961) (1987)
1.
Grind down heads of bolts in brake booster mount from inside vehicle and remove bolts from firewall (Figure 2).
2.
File the two existing holes in the firewall to match the two elongated holes in the firewall reinforcement plate (Figure 1).
3.
Reinstall brake booster.