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87 190E 2.3L
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31 Posts
Discussion Starter #1
Anyone every messed with the timing on their 190? I can turn the distributor all the way in either direction and the engine runability does not change, any ideas?

CC
 

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'85 2.3-16 '99 C280 '11 GLK350
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4,804 Posts
Timing is done electronically, with retard and advance governed by a resistor circuit and the vaccum advance.
 

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'85 2.3-16 '99 C280 '11 GLK350
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4,804 Posts
My best "guess" is that the M102 engine block was also used for carburated versions and was based on older Mercedes blocks, so the adjustable mount on the distributor was inherited from the old design. As you noted, changing/rotating the distributor will alter timming for a few seconds before the fuel injections' ECU alters the timing to correct it back to "normal."
 

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'85 2.3-16 '99 C280 '11 GLK350
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4,804 Posts
The other "holdover" from past applications of the M102 block is the cutout in the front of the cylinder head that was used for the cam gear driven hydraulic pump for the SLS suspension in the wagons (Estates).
 
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