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sprinkles08
sprinkles08, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 21570
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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998 SLK top will not open. Windows go down trunk lid opens

Customer Question

998 SLK top will not open. Windows go down trunk lid opens than nothing else
JA: Is this your first time dealing with this issue?
Customer: No it has happened before
JA: What is the model/year of your Mercedes?
Customer: 1998 SLK 230
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: Nothing
JA: Anything else you want the mechanic to know before I connect you?
Customer: Last time this happened it started t work again on its own
Submitted: 2 months ago.
Category: Mercedes
Expert:  sprinkles08 replied 2 months ago.

Hello and welcome to JustAnswer!

You may have a number of things going on depending on exactly what the symptoms are. It will most likely take some testing to determine what is happening, a dealer level scan tool may be necessary.

The problem could be hydraulic, mechanical or electrical. The module that controls the top may be disabling it due to an incorrect input being seen.

Do you hear any noise when attempting to open it?

Customer: replied 2 months ago.
I hear hum usually during normal operation. Now the top is working again but don't know when this problem will be back.
Expert:  sprinkles08 replied 2 months ago.

When the top was not working did you hear any noise when trying to move it?

Customer: replied 2 months ago.
the normal hum sound
Expert:  sprinkles08 replied 2 months ago.

If you still heard the pump motor but the top wouldn't move then there is either mechanical binding, low fluid level, or the pump is failing.

Customer: replied 2 months ago.
I did nothing to repair this but the top just started working fine the next day
Customer: replied 2 months ago.
Where is the pump located and how would I check it out?
Expert:  sprinkles08 replied 2 months ago.

There is a pop out panel on the right rear quarter trim, the pump is behind there. The first thing that should be done is remove the access panel, remove the fill plug on the reservoir and see if the fluid is full.

Customer: replied 2 months ago.
I found the pump but could not find any fill plug. Where would it be located?
Expert:  sprinkles08 replied 2 months ago.

It's the hex plug on the top of the assembly.

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