DIY: Installing a new Changeover/Heater Control Valve

[mandrek]

THANK YOU - THANK YOU - THANK YOU.... I really do appreciate you taking the pain to click & download 26+ pictures with clear instructions. I have a 2004 MB E500 that had the exact same symptoms (No heat). Just to ensure, I took it to the dealer & they verified that the changeover valve needed to be replaced ($100 for diagnostics). Their quote was $600 +taxes to replace it!!! So I simply bought the part (~$60 with taxes), came home, followed your instructions & after 3.5 hours, it all works!!! I took my time & worked slow, but getting to some of the components - especially to the hose clips was a challenge. Thank you for your tips on using the hanger. That really worked well. That's about $130/hour. The biggest item (besides saving a bunch of money), was the sweet smell of self-reliance!!! Thank you, again. - Mandrek

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[BkE5Kid]

This write up is the truth....I follow these steps down to the wire hanger and it worked a 2003 E500 and My 2005 E500...Heat Never Felt That Good....

[no_clue]

THANKS TO W211RYDA!!!!!!!!!!!! I just changed it myself also. Save myself 2.3hr of $340 before tax labor quoted by dealer.

And seriously, the annoying part is the panel screws! ( thankfully, I bought 4 before I start this project. * I did break 2 of them. )

Also big thanks to Chiro's suggestion: ( once remove the assembly, you got all the space you need and only took me 15 min to replace the valve part!!!! )

6.Remove not only the winshield wipers but the whole wiper assembly as previously mentioned . It is only an additional 3 bolts ...simple ..no alignment issues on replacing ,very straight forward.

Part:
Valve: 211-832-05-84 $49.35
Rivet: 123-990-05-92 $2.13 ( rediculous price for a little plastic screw, isn't it? )