Here's a homemade tool for torquing the alternator (Bosch 90 amp) shaft nut. W124 Mercedes DVD repair group 15-5700 calls for 80 Nm to secure pulley to the "compact" alternator shaft. Grind two flats on opposite sides of the 22 mm socket and hold with an adjustable wrench. Insert a XZN 10 mm x 100mm Long Bit 1/2in. drive into the 12 point internal socket of the shaft. My buddy Paul gave me the idea.

I had symptons where most of the dashboard idiot lights turned on while the car was idling. Most were dim except for the battery symbol which was relatively bright and dimmed as engine speed was increased. The ABS light was on at idle and turned off when engine speed exceeded about 1000 rpm.

With the old (bad) alternator I recorded voltage readings across the battery terminals of 12.4v with engine not running, 12.2v at idle, 12.3v at 1500 rpm, 12.6v at 2000 rpm.

With new rebuilt alternator I recorded voltage readings across the battery terminals of 12.9v with engine not running, 14.4v at idle, 14.4v at 1500 rpm, 14.5v at 2000 rpm.

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1995 E300D