Sedans of the era, W108, W114 (6cyls gasoline, late 60's and early 70's) used a simple top mount bracket. It was held on by three bolts. The low hood line of the SL would not allow use of this set-up with the tall York reciprocating compressor, so the monster bracket was used on the SL. All W113 cars without AC had the alternator mounted low on the engine. With the monster bracket, the alternator was moved to the top. With the compact Sanden type rotary compressor, there is ample room for a top mounted compressor, and the alternator is left in its original position below. Other minor changes must be made.