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  #1  
Old 07-10-2007, 04:42 AM
72 Merz 250C Guy
 
Join Date: Jun 2007
Location: Overland Park Kansas
Posts: 3
1972 merz 250 C

I just bought my 250 C and after anxiously waiting 3 weeks for it to arrive (the transport was a hit and run - their new Vlovo spent 2 weeks in the body shop, I was nervous my car had been stolen...), I'm rushing to get it inspected and tagged, the throttle linkage was frozen in a near 3/4 throttle, could not get into gear at the rpm's, have gotten it moving but the throttle springs are weak, the result is I can drive accelerating fine but have to use my foot constantly to pull the accelerator up so I can slow down or stop, A hair - raising drive!

My other problem, the turn signal blinker and the hazard flashers will not work, since neither are working, and the fuse appears unbroken, "is" there a relay that controls this? and Where, is it? My Mercedes dealer hasn't located it, shows relays with no indication of what they are, any ideas?

I can't wait to throw the sliding roof open and take a relaxing drive!

DJ


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  #2  
Old 07-10-2007, 07:06 AM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 4,354
The hazzard switch doubles as the flasher. Like an american car, it won't flash if some of the bulbs are dead. Start diagnosing it by checking for voltage at the tail lights and front markers. From there the multi-purpose switch and the flasher. You'll need the pin-out information for both.

As for the throttle issues, you have (or should have) a pair of zenith carbs under the hood. Though webber conversions are not unheard of. To get a flavor of what you're in for (it's not that bad; just a spirited challenge), search the archives here for the word zenith.

Most importantly, call 1-800-for-merc, which is a Daimler-Benz hotline number and ask for the service CD for your car. It's going to be about 30$. It will help answer the next wave of questions too.

-CTH
PS. Welcome to the group. You'll find dozens of us with the same car.
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  #3  
Old 07-10-2007, 06:12 PM
Registered User
 
Join Date: Mar 2004
Posts: 758
Check the throttle linkage at the firewall. I believe there may be a spring located there. I may be wrong, my 114 is in storage and I have not looked at it for quite some time, but I seem to recall that other spring. The carb springs are rather small and light weight. The linkage itself is fairly heavy between the foot pedal and carbs, so the other spring is added. Yours may be missing in action.

230/8
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  #4  
Old 07-10-2007, 07:49 PM
Registered User
 
Join Date: Dec 2006
Location: beautiful Bucks Co, PA
Posts: 961
Also at the throttle linkage on the fire wall are 2 blocks supporting the linkage. They can become dry and cause the throttle to bind. Use some good penetrant and work the linkage. You should disconnect the carbs from the linkage while doing this to avoid flooding.
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  #5  
Old 07-11-2007, 06:35 AM
JimFreeh's Avatar
Benz addict
 
Join Date: Mar 2007
Location: Hampton Roads, Virginia
Posts: 3,366
W114 flashers.....

.....are part of the switch. The pull/push switch in the console (round knob) that controls the 4 way flashers also contains the relay that operates the turn signals.

Good luck, sometimes mechanical agitation and a shot of electrical cleaner will get them working, also replace your fuses if they are not recent. A fuse can look ok, but not pass current if it is old.

Not an inexpensive part, and it seems that they have a fair degree of failure, so finding one in a junk car is still a dicey proposition.

For the linkage, clean each ball and socket joint, then lube with automatic transmission fluid. I ended up adding another return spring on my 250C to get the snap back action I wanted.

Jim

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