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RIP, Lead Technician
Category: Car
Satisfied Customers: 5591
Experience:  A.S.E. Master Technician, Advanced Level, Smog - European, Domestic, & Asian -- Car Category Mentor
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How do I replace a 1987 560SL Mercedes EHA Valve

This answer was rated:

Car is idleing rough when cold.
It is in shop right now and they have said it needs a new warm-up regulator, but there is not one on this car. Quoted 500-600 to replace it....I am pretty handy and if fairly straightforward I can do it.

Hi, welcome to jA.

  • Just to understand you correctly - is the warm up regulator missing?


Customer: replied 9 years ago.
Reply to RIP's Post: As I understand it, Mercedes changed from a traditional warm-up regulator to an electronic version mounted on the backside of the fuel distributor....part is about $ figure if it is an easy thing, then I would replace and save $300.....
Short answer is nothing is missing...

Alright. Try this...below is a pic of the EHA valve. It's fairly basic to removal and install.

  1. Remove air cleaner assembly
  2. Remove electrical connector from EHA valve.
  3. Remove two screws retaining valve to fuel distributor.
  4. Be sure old o-ring come off of fuel distributor.
  5. Install new valve, with new o-rings.
  6. Re-install electrical connector and air cleaner.




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