So my dad is driving my 1987 190E 5speed as a winter car, and he has developed an interesting issue. Sometimes, when you turn on the turn signals the signals work, but it turns the climate control totally off.

Sometimes the turn signals just plain don't work.

Sometimes you hear a clicking in the dash like a relay clicking

Most of the time it works as it should, it seems difficult to get it to misbehave when you want it to to diagnose, but when it is acting up it seems to never stop until you get to where you are going.

Any ideas? I don't see how the CCU and the turn signal stalk are at all wired together.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

Ground points maybe? Time to get the ETM out.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Next time I see the car, the plan was to clean up the major interior grounds.

If anyone can point out where some of the major grounding points are, that would be appreciated.

__________________
68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i