I do believe that is what I will have to do. I will not get a chance to get started on it till the middle of july. Do I need to maintain the pressure while trying to open or will the pressure put it in the unlock position?

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project