E430 tensioning alternator belt?
 

Greetings,

I have just changed a bad alternator on a 1999 E430 sedan.
I am not exactly sure how to get the alternator belt back on and realize
that I must release tension on the tensioner. There is a pulley with a 15mm nut and another much smaller bolt going through it. I am assuming this is the tensioner. Can someone please help me ?

The rebuilt alternator was $209.00 and was rebuilt by Beck Arnley and is the identiical Bosch that it replaced. Much nicer than the $689 the indy wanted for the part. Not too hard changing it out but very close tolerances.

Thanks for your help,

Aloha from Maui

The poly V-belt tensioner is spring loaded. Twist the Torx bolt in the center of the tensioner pulley counter-clockwise to relive the tension.

thanks Vince
 

I was able to easily get the belt back on with your advice.
Thanks so much for the information. The Benz is back on the road.

By any chance could you tell me how to reset the check engine light without a trip to the indy shop?

Mahalo and Aloha,

Paul

The code (Check Engine light) must be erased with a code reader. If you have an Autozone, they will read and erase the codes. I use a modestly priced code reader from Actron. It is limited to reading and erasing OBDII codes. About $160.

check engine code disappeared by itself
 

title says it all, about the 4th or 5th start...