hasn't been run for about 1.5 weeks, radio + lights work but starter will not engage. I can hear the starter solenoid but the motor does not fire.
Tried jumping but had no effect. Motor started fine previously. help!

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1993 320TE M104
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past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
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"music and women I cannot but give way to, whatever my business" -Pepys

Replace the starter, or smack it with a hammer and a long punch. What year is your SE? And it is a 116 chassis?

Try tapping the starter lightly with a wrench or hammer, sometimes the solenoid gets "stuck." Otherwise, sounds like you might need a new starter...

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

it's a 1980, 116 chassis. 116 3.5 litre motor. Just to clarify; I can hear the starter solenoid clunk, (though after 2 goes it gives up) but the starter motor itself does not engage.
I tried jumping it with my 124 diesel, but didn't help (though my jump leads aren't the best...)
The radio still turns on, exterior lights are dim and dip when trying to start.
Foxing me as it was fine less than 2 weeks ago.
Only service items I've changed are fuses and spark plugs.

This car and chassis is new to me, being used to the 124 before- whereabouts is the starter located on these cars?

__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys

FYI, 116 engine is a 3.8 or 380.
Starter is on Right Hand side, under exhaust manifold.
Give it a good smack when someone is holding the key over

ok, i'll try the smack!

It is the 3.5 litre btw, note my location- you guys would call it a euro...

__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys