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Old 09-03-2002, 10:29 AM
Bob Boyer
Posts: n/a
W126 AC low pressure line: help!

On my vehicle ('88 420 SEL), apparently, previous owner retrofitted to 134a.

Which would be the low pressure line, so I know where to add refrigerant? I only see a thick line on top of left side of engine compartment, with a blue plastic covered valve. Is this the low pressure line, or is there one below it closer to the compressor?

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