if you are going to exchange it anyway, i recommend the 65 amp. of course the regualtor/ brush combo is the usual culprit and can be changed in 15 to 20 min. if you can reach the screws. the last set i bought was about $16, so if you're not sure what is wrong with it i would change that first. good luck.

i find that the 45 a in the 240 d is inadequate on a long trip running the air and will slowly drain the battery. 55a may not, but the one i upgraded i went to the 65 a like is on a 300dt.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.