You can order a 4A1 rebuild kit right here on Fastlane for about $64. The part number is C9010-11283.

This model is odd to find documentation for. The engine is in the Haynes manual for the 123, which covers the diesel and gas 280 engines, including the 4A1's. The body is in the Haynes manual on the 114's.

The MB CD for the 114 has good documentation on the carb and all the rest of the car.

Your mechanic is obviously tired and frustrated. With a little tinkering and patience, most of these carbs can be rescued. Yours does not have the symptoms of warping, so give it a chance before you pop the $750 or so for a Weber kit.

The premier source for the Weber is JAM Engineering.

My .02 as we say.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe