Originally Posted by
longspoon
Thanks for your response 180, hatch it is, ( tailgate or boot door here in UK. Two countries separated by a common language?). Not sure if the problem is a damaged lock mechanism or fractured vac line. Only had the car one week, door opened during my inspection but hasn't worked since. Air pump works AOK as do all other locks. Past experience tells me that small dia. poly pipe is a good substitute for yellow Merc tube. Any spray shop supply will have stock at little cost. I will post outcome once temp rises above freezing.
In the LH drive cars the hatch airline is teed to the passenger door line and I have always wondered if the application of a so called vacuum to the passenger door end of the line would overcome the leak it the hatch air line.
I do not think the vacuum can be too much as the vacuum that can obtained with a small pump cannot be less than -14 psi. in theory and would not actually get that low in practice. Applying a vacuum with an oil extraction unit might just do it.
If I recall correctly it is pressure that locks the doors and a so called vacuum that opens them. If that is wrong then pressure would have to be applied instead of a vacuum.