Question about Mercedes-Benz 420-Series

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HYDROPNEUMATIC SUSPENSION I HAVE A 1986 420 SEL. THE HYDROPNEUMATIC SUSPENSION IS NOT WORKING. HOW DO I SOLVE THIS PROBLEM

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  • Anonymous Mar 29, 2014

    Sel

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Hello, I've never seen a 420sel with hydro-pneumatic suspension. Are you sure that it isn't a 560sel?
Anyway, there is a tank on the left side of the engine compartment close to the front that is a little larger than a qt jar. It may look yellowish in color and has a steel line going to it with a screw on lid and a dipstick. Pull out the dipstick and ck the fluid level. If it shows nothing, fill to the correct level only using the Correct Mineral Oil That It Calls For. If it is full, you probably have a bad pump that is located on the front of the engine.
I hope this helps.
CYA, Gator241

Posted on Feb 06, 2009

  • Wally Wicker Feb 09, 2009

    Hello again, If you find this information to be correct would you please enter a "fixya" rating.

    Thanks, Gator241

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What didn't work: Clicking the gas cap to make sure it was on securely; replacing the gas cap with an OEM cap purchased from the dealer.

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