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Ask Lou P. master tech Your Own Question
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3740
Experience:  15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
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Suspension will not air up

Customer Question

suspension will not air up
Submitted: 8 months ago.
Category: Mercedes
Expert:  Lou P. master tech replied 8 months ago.
Hello. What fuses did you check? The pump fuse is in the passenger side engine bay fuse box.
Customer: replied 8 months ago.
that the one I checked think it was a40 put a new one in
Customer: replied 8 months ago.
can not hear the pump running ,got the code to see the shop, then got the one stop car to low, after sitting now the car is so low do not know if I can even get a jack under it
Expert:  Lou P. master tech replied 8 months ago.

ok so we can do two things, jump the relay to see of the compressor comes on and if not we check the fuse and the connection at the pump to see if there is power present. do you know how to jump a relay or jump across terminals 87 and 30 to apply power to the consumer?

Expert:  Lou P. master tech replied 8 months ago.

the fuse is the middle orange 40 amp fuse of the three up in the front of the passenger side fuse box in the engine bay and the relay is the first relay behind the orange fuses , when you pull it up there are letters that designate the position and that relay is position "O" so you know you have the correct one. use a wire and jump 87 to 30, if you look on the bottom of the relay you will see the numbers and the terminals that correspond to 87 and 30 are the ones that you need to jump power across . so you simply use a wire and a terminal and put it in the fuse box one end in each , so one end in 30 and the other is in 87.

Expert:  Lou P. master tech replied 8 months ago.

did you have any luck are you still needing assistance?