LOCATION OF HIGH PRESSURE VALVE

Just had Tempmatic A/C system recharged on 1992 190E 2.6 with 135000 miles. It took 1.5 pounds of R12 (blowing ice cold) A/C Tech wanted to check high pressure end, but was not familiar with Mercedes and could
not find it , neither could I. What is the location of this valve and and what damage could be done by not having checked this pressure?
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Supposed to be by the drier.
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Around the headlight. Open the hood. Look around your right hand side (facing car), roughly behind the vrtical edge of the grill. The valve faces front.
r parris wrote:

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Thank you very much, still blowing icy cold!
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