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Trigger point question

Started by mrkozzy, 20 September 2024, 04:58 AM

mrkozzy

My D-Jet M110 has trigger points.
Never been changed.
Car runs extremely well but has a slight "miss" every now and then at cruising speed. Its been doing that for years & years. Something I've become used to.
 
Question: Should I be looking into my trigger points or leave well enough alone. I believe they are impossible to get.
MrKozzy

NalgeneSF

I've seen a few videos of people taking them out to clean them. But if it generally runs well it could probably be left alone.
1973 450 SEL D jet

UTn_boy

#2
Each set of the 4 points sets had their own phenolic rubbing block.....just like a set of ignition points have.  And yes, they do wear, and the dwell changes.  They're a regular service item, and are supposed to be checked/cleaned/lubricated (with correct point cam grease) or replaced every 60,000-70,000 miles.  These are very often overlooked and forgotten about, much like services on timing chains/rails and greasing the front axle on a W108/W109 chassis at 3,000 mile intervals.

Regarding availability, the assemblies themselves are no longer available, but the last I heard Mercedes and Bosch were offering a repair kit, where you rivet and solder in new points and clear plastic covers on to the old original assembly.  They were around $600-$700 USD for the kit, (probably $1,500 AUS).  However, I think Mercedes ran out of stock, and Bosch Classic has them, but they no longer ship out of Europe for some reason.  So yeah, we're kind of screwed.  I guess the next best thing is to have a few spares on hand?
1966 250se coupe`,black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3,papyrus white/dark red leather
1975 450se, pine green metallic/green leather
1973 300sel 4.5,silver blue metallic/blue leather
1979 450sel 516 red/bamboo

mrkozzy

On the next fine day, I will remove the in car triggers and compare to the 2nd spare set which I have. (somewhere?) If there is no marked difference, I will clean them up and leave well enough alone.
 If they are indeed looking haggard then I will swap them over.
More later..........
MrKozzy

celberg

First of all, check Your alternator. If the alternator charges less than 14 V one can feel those "misses" You mention.
350SL 1973
350SE 1975
SL500 1996

mrkozzy

MrKozzy