Where is the hydraulic pump on a 1995 Mercedes 500 sl that controls the convertible top?

take out the spare tire from the trunk.

you'll see a black raised cover...there are 3 10mm nuts holding it down...they are easy to take off

remove the black cover.

you'll be looking at the hydraulic pump and resorvoir.

I don't know why you need to access this pump.

On the center console, the covertible top switch...that big red one...does it flash or stay lit? Has the pump stopped responding? There's an automatic shut off that protects the pump from burning out. Are you leaking fluid from the system? If you have oil seeping down from around the visors, you will need to replace both of the servor units. There is also another hydraulic system for the rear part of the top's system, which is behind the boot section.

Also...the system's computer will need to be reset (clear the codes) at a dealer after you replace whatever is needed.

You can also access the top manually....there's a roof tool that you should have...check your owner's manual on how to perform this.

BTW....the dealer charges nearly $300.00 for each of those hydraulic servos....there is a guy in Missouri that rebuilds them for around $100.00 for 2.