Just thought I would ask the group if their experience with Nippondenzo compressors has been as bad as mine. I have replaced compressor two times within the past 2 years. The first two proceeded to lock up on me , and the third one had speed sensor problems. Positive side if there is one is that the first two were covered under warranty and I did not lose any money per say. The third compressor was out of warranty so I had to cover the repair cost. Are these compressors a piece of junk or what gives? All the compressors were new and installed by a local independent MB shop. The mechanic is a friend of mine and he has done countless A/C compressor change-outs. I even helped him replace the last one. Comments appreciated. Johnny

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1986 300SDL 173K
1985 300D [sold]
1996 Explorer 62K

Make sure the system is flushed well. If metal particles are present, all the rubber hoses need to be replaced. The particles embed themselves within the rubber. Oil quantity is very important, must have enough oil. In addition I hope the Receiver dryer is always replaced when the system is open, failure to do so will cause moisture and contamination.
Look what color the Aux fan switch is on the rec dryer, if green, evac and change to the red one. The red turns the aux fans on much sooner causing lower hi side pressure.


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Mercedes-Benz Master Guild - 2 years
Shop Foreman - 20 + years - dealer.
Part owner - MBZ Transmission remanufacture
2000 SL500
1995 E320
1989 300SE

It is a must that this work is done properly. IF you miss one step, it will junk out soon. IF the compressors siezed up, metal entered the system. You have to replace the manifold hoses and the drier. You must use a good oil and add the proper amount.

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Benzmac:
Donnie Drummonds
300E
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

As both previous posts from Benz technicians show, you probably have metal in system from original compressor failure. Many times the flakes of metal do stick in hi-press rubber hose & sometimes in the condensor. FLUSHING doesn't remove this type of debris. The best way to see if there is metal in system is to remove drier & use an exhaust chain cutter to open the drier to see if there is metal from compressor inside of it.

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MERCEDES BENZ MASTER GUILD TECHNICIAN (6 TIMES)
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 16V ITS SCCA racecar

[This message has been edited by M.B.DOC (edited 09-06-2000).]