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#1
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Late W124 Relays Behind Instrument Cluster
My 1995 E300D (W1214, OM606NA) has two relays on the left side and behind (really, in front of) the instrument cluster. My older W124 (1987 300D Turbo) didn't have these relays. Any idea what they're for?
The silver one (5 pins, SPDT) is 001-542-02-19 and the blue one (3 pins, SPST) is 001-542-99-19. Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#2
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Not sure on blue, but IIRC the silver is for the engine immobilizer, I had to jump a couple pins on mine as it was malfunctioning and keepiyme from starting my car.
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1995 E300 Diesel ~300k |
#3
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Does your car have a climate control Rest switch?
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#4
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No REST for the wicked
Unfortunately not. I looked at acquiring all the bits and pieces of the European factory REST set-up. I also designed my own circuit, fairly easy to do, decided I didn't need a REST function enough to make the modifications.
Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#5
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Expletive Deleted....I just tried to do the same thing as you to bypass the K49 relay. Only problem is that I thought the K49 relay was the blue one. Now my tach isn't working, and I'm not sure if it is related or if I did something else while pulling the cluster. I also noticed that the person who sold me the car a while back apparently pulled the bulb from the check engine light. How thoughtful of them to not burden me with such an annoying and distracting light on my dashboard. If I still had their contact information I would probably tell them just how much I appreciate that wonderful courtesy, and their taking the time to consider my welfare. By the way...how did you jumper yours? I know which pins to jumper 87 & 30 if my memory serves me. I have the proper ones written down somewhere, but what did you actually use? You did have to plug the relay back in afterwards correct? I was thinking that a piece of 16-20 gauge wire would probably work. I don't happen to have any at the moment, and I was considering using an upholstery staple from a staple gun that I cleaned the coating off of with acetone. I've done that on breadboards before, and it worked fine. Not sure if it would work in this situation, or if I should just suck it up and spend the $0.03 on 2" of wire.
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#6
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Whew....I read another forum, and discovered that apparently fuse #5 also controls at least some portions of the instrument cluster including the tach. A quick replacement of fuse 5 fixed my tach problem, and I was then able to pull the proper relay out to jumper. Once I get a bit of wire that is.
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