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Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 48611
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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Mercedes-Benz 560SL i have a 1988 560sl with an high idle

Customer Question

i have a 1988 560sl with an high idle and abs light on. I have change the idle air valve and the idle air relay and tha voltage overload relay. This has not solved my problem. I do not have a radio tester.
Submitted: 3 years ago.
Category: Mercedes
Expert:  Marty replied 3 years ago.

eurotec :

Hi, it sounds like you still have a bad overvoltage protection relay or the fuse in the relay has blown or there is no power getting to the relay.

eurotec :

Does the ABS light come on as soon as you start the car?

eurotec :

There is a small wire that connects to the positive battery cable at the battery in the trunk. The wire powers the overvoltage protection relay. Check to see if that wire is secure.

Customer:

Just checked wire is good . The relay is new . i do have power going to it

eurotec :

Did you make sure that the fuse is still good in the relay? How high are the engine rpms? Does the ABS light come on as soon as you start the car?

Customer:

Just recheck fuse.I replaced just to be sure. abs light comes as soon as i start. idle at 1500 to 1700. even after letting car get to opperating temp

eurotec :

What happens when you disconnect the plug at the idle control valve. Does the idle go even higher?

Customer:

my bad already had valve un hooked . i did use a different over relay seens to have fixed problem.I will gladly accept you help . You cannot believe the head ache i have had with this car

Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 48611
Experience: Bosch Certified Master Tech. Over 35 years experience.
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