E55, CLS55, SL55, S55, M113K AMG Mercedes Performance 3 Piece Idler Set carbon fiber When it fails

When it fails

Any car with over 100k miles should replace the stock plastic pulleys

M157 RaceIQ ECU tune

The quicker shifting also benefits the transmission because there's a lot less slippage shifting between gears

5 axis CNC to ensure precise quality

E55, CLS55, SL55, S55, M113K AMG Mercedes Performance 3 Piece Idler Set carbon fiber When it failsUPD MERCEDES M113 PERFORMANCE 3 PIECE IDLER SET. Not a cheap offshore imitation. Made in America, this 3 piece idler set replaces your stock plastic double idler pulley assemble and tensioner pulley with high quality and high performance replacement parts. 5 axis CNC to ensure precise quality. Replace your idlers with UPD`s performance idler set today, as the stock AMG plastic idlers, with rubber bearing seals, are known to fail from the high heat and