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Mercedes R129 1998 280SL
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Discussion Starter · #1 ·
Hi.

Hoping someone may be able to help me.
I have a 1998 R129.
I bought a replacement PSE pump as the original takes an age to unlock despite taking no time to lock. I have tested all the lines and actuators with a Mittyvac.
When I put the new pump on it unlocked the car immediately but when I try to unlock it clicks and the actuators inside which manages the forward reverse moves a fraction but the pump does not start up.
I swapped the motors over between pumps and they both still have the same faults. I also swapped over the valve section but both pumps continued to behave the same.
I assume that they must both have faults in the circuitry.
Can anyone offer some help.

Thank you
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· W163 and General M Gremlin
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