I fully agree to that!

I have two quick questions:
1.) What specifications do the capacitors and resistors have (or RadioShack cat #).
2.) I did the capacitor on my watch and it started working again, but it's showing erratic times. I somewhere read a certain resistor needs to be replaced in order to have it showing the right time. Do you by chance know which on that is?

Again, thanks a lot for your help!!!!

The capacitors on the 300SDL's cluster were
220uF/6V
47uF/16V I think.

I replaced them with:
220uF/6.6V
47uF/50V

The resistor was 33 Ohm, which is available at radioshack as that's where I got it. The capacitors are fairly common values so I think RS should have them as well.

Just be sure to open up your speedometer first before buying supplies so you are sure of what you need. The first gen speedometers are different than the second gen. Second gen are what is listed above. First gen I cant recall at the moment.

I've not seen the replacing the resistor comment. I'd have to look at the clock closer and see. As long as you are using the same capacitance on the replacement capacitor I cant see an obvious explanation for the erratic behavior.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Hi,

very stupid question, but I wanted to double-check before I buy something wrong; I saw that the resistors come in various wattages. Which one would be the best to use? I think RS mainly stocks 1/8, 1/4, and 1/2 Watt resistors.

Thanks a lot for your help!

Not a stupid question at all. I should have specified. The 33 is a 1/2 watt resistor.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Hi,

I finally came around to work on the odometer gears and the watch.
It was actually quite easy to find the 5 soldering spots to remove the speedometer from the board as someone has done that before (I guess, when they exchanged the speedometer with an US version).

I realized that the capacitors and also the board layout look very different from yours. I only had one 47uF and one 220 uF and both looked very modern. I thought it wouldn't make sense to replace them as they still looked fine.

As for the watch, I have a 200ohm resistor around which it looked pretty black. However, I could test it and so I assumed it must be ok.

What is your opinion on replacing these resistors and capacitors?

Thanks!

Attached Thumbnails

   

I would replace those capacitors for certain. The one says W. Germany on the side of it, I believe which puts it at the minimum of 20 some years.

If the resistor(s) don't look damaged or harmed in any way I would not bother replacing them. The capacitors are what can age and fail.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Thanks for the recommendation!!
The next time I'll have to work on the odometer, I'll replace those.

So now my watch is finally keeping the right time!!!
I had most of the connections re-soldered together with lubing both the gears and adjusting mechanism seems to have helped...

Very happy and thanks for all your help!

I can't believe it!
I was so happy that the clock is finally working accurately, but now I realized that my speedometer is about 10-15 mph too fast (depending on the speed).

Could this be in connection to the old capacitors? Or what else could it be?
I replaced the gears (but miles are correct as tested with GPS) and soldered the connections to get the speedo-/odometer off the board.

Thanks for your continued help!