Hi folks
have been reading lots of posts and suspect either my OVP or Klima relay are suspect. I have no test equip other than a couple of multimeters.

I checked out the replacement prices and they are not cheap so can anyone tell me how to test these relays with just my multimeter and pieces of wire?

I will need exact pin numbers please if possible.

the symptoms are no cold air, condenser completely cold. I have been able to spark the compressor into life at idle by pulling and replacing the contact on top of the accumulator so I dont think thats the problem. My feeling is the condenser is being tripped out by one of these two relays.

all help of reference to posts I have not yet found appreciated.
thanks
Keith

SEARCH facility - upper right hand corner - been discussed many times

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'91 300-SEL

You were right there was more when I searched harder.

I applied the two suggested methods of testing and both told me the OVP was perfect. I am now stumped as I have four electrical problems and need a new theory as to whats wrong. I have hooked into another thread on 300D A/c problems so wont repeat it here.

Keith