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  #1  
Old 08-18-2004, 02:36 PM
chazola's Avatar
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Join Date: Nov 2003
Location: London, United Kingdom
Posts: 1,241
124 MAS relay question

I had a problem with my 300e stalling occasionally and checking the search it said to check the MAS relay solder conections. I pulled out the relay and the only visual electrical check seemed to be the pins on the bottom and the connector the relay sits in, which all looked fine. Are these the solder connections that were mentioned?

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1993 320TE M104
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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
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Old 10-24-2007, 08:51 AM
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Join Date: Jul 2003
Location: Richmond Hill
Posts: 149
Hi, you must have got it fixed or maybe no longer have the car but in answer to your question; the solder connections are inside the mas relay where the inside of the pins are soldered to the board or relay components.

The solder points can develop small cracks that open the circuit (shutting off power) They cause intermitent problems because at certain temperatures they are connected, but at other temperatures and humidity the crack opens creating a gap, stopping current (voltage) flowing and causing stalling.

take care,
Acky

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