YOU MUST RETURN YOUR OLD SERVO 7 DAYS AFTER RECEIVING MY NEW UNIT, NO EXCEPTIONS ,NO EXCUSES PLEASE ! The buyer MUST contact me BEFORE I ship the unit , to make arrangements to return the core . 

Tested , replaced electrical motor , FRESH rebuild or changed the mechanical movement  , calibrated , new gaskets , all 14 screws used are stainless steel , GREAT condition , very hard to find  with NEW ALUMINUM BODY ( yes , NEW , never used before , high precision engineered and improved , individually stamped , precision crafted by the aerospace machine shop , from the best quality aluminum). It was tested and professionally calibrated and is 100% perfect . If the buyers decide to return the unit , all the electrical functions must be in working condition , just like when was shipped , the on / off heating valve must be fully functional , and my seals must not be altered . I test all my parts before selling them , and I will work with the buyers to solve any problems . I make a short video with my servo unit working .

YOU MUST RETURN YOUR OLD UNIT , OR A $ 150 CORE EXTRA CHARGE WILL BE APPLIED . The core unit must  not be open !

Before I mail the unit , I will provide the buyer with detailed pictures of inside the unit , replaced parts and motor. WARNING !!!! IF YOUR OUTPUT AT THE SERVO UNIT BLACK/GREEN WIRES IS HIGHER THAN 6-7 V , YOU WILL DAMAGE THE UNIT AND MY WARRANTY WILL BE VOIDED . Check the AMPLIFIER first !

FITS 

w107 W123 W117 & W116 450SL ,380SL  300SD , 300D ,  300TD , 450SEL 280SE 280CE 280SL  450SLC 380SLC

Attention to all buyers : 99.99 % of those units fail because the middle plastic part crack , damaging the motor and the mechanical movement  inside .  Please call before the purchase because a lot of times you may have an additional problem with the amplifier . I will be glad to provide you with free technical support , troubleshooting suggestions and electrical diagrams , if needed it. Cris 8054559477 .

 I only use high quality materials , including new redesign , engineering to perfection aluminum body , machine shop by the aerospace certified machine shop . Each unit have my business stamp and unique serial number.

Buy with confidence : I've sold over 50 Servos in the past year,with 100% feedback ! Returning your old Servo is not optional ,is a must !