OK. so i got my E300d estate on the road last week with a new MOT and it runs well apart from the air con.
I believe that it has a genuine mercedes aircon system with the EC button.
The problems are thus:
The auxilliary air con fan is running constantly on fast speed when i switch ignition on - there is only one fan although everywhere i search there appears to be two fans on the front of most cars.
For this i have checked the secondary aux fan relay (behind fuses) and it appears to be functioning correctly with no burned points and clicks on and off correctly.
The wiring to the connector on the temperature switch on the front of cylinder head was shorting near the connector so i insulated them correctly but still no joy.
I removed the Klima relay but the fan still roars into action with ignition on.
I shorted (in turn) the connectors on the reciever/dryer, but still the fan comes on.
I am now at a loss as to what else to try.
I am not getting any cold air from the aircon as the clutch will not engage, i had the car at kwik fit yesterday and after gassing, the aircon would still not function, so i also have to see where the problem for this lies.
I shorted pins 87 and 15 (i Think) on the Klima relay but clutch still will not engage.
Can i put a live feed direct to the clutch and if so is there a connector on clutch wiring as i cannot see one, just seems to be a wire going into the loom.
Any wiring diagrams would be helpful (1994 S124) and any other suggestions please.
I would prefer not to go to a specialist as am sure i would be raped and pillaged by them before it is completely fixed.
HELP
I believe that it has a genuine mercedes aircon system with the EC button.
The problems are thus:
The auxilliary air con fan is running constantly on fast speed when i switch ignition on - there is only one fan although everywhere i search there appears to be two fans on the front of most cars.
For this i have checked the secondary aux fan relay (behind fuses) and it appears to be functioning correctly with no burned points and clicks on and off correctly.
The wiring to the connector on the temperature switch on the front of cylinder head was shorting near the connector so i insulated them correctly but still no joy.
I removed the Klima relay but the fan still roars into action with ignition on.
I shorted (in turn) the connectors on the reciever/dryer, but still the fan comes on.
I am now at a loss as to what else to try.
I am not getting any cold air from the aircon as the clutch will not engage, i had the car at kwik fit yesterday and after gassing, the aircon would still not function, so i also have to see where the problem for this lies.
I shorted pins 87 and 15 (i Think) on the Klima relay but clutch still will not engage.
Can i put a live feed direct to the clutch and if so is there a connector on clutch wiring as i cannot see one, just seems to be a wire going into the loom.
Any wiring diagrams would be helpful (1994 S124) and any other suggestions please.
I would prefer not to go to a specialist as am sure i would be raped and pillaged by them before it is completely fixed.
HELP
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