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Ok i have a 91 190e 2.3 8 valve and the drive belt is getting pretty loose. It squeaks alittle when i start it to. Ive been having charging problems lately so one thing i wanna do is get some better tension on this belt. Is it the tensioner or the shock damper that provides the tensnion to the belt on these cars?? Ive seen both for sale but i need to know which one is the fix here?? Thanks!

Just in case u dont know what im talking about here is a link to both parts.

Mercedes Belt Tensioner shock or damper W201 190E 2.3 - eBay (item 160467837453 end time Dec-10-10 08:25:17 PST)

Mercedes Belt Tensioner KIT W201 190E 2.3 84-93 - eBay (item 160511663119 end time Dec-26-10 18:25:36 PST)
 

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'87 190E 2.6
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186 Posts
The tensioner - provides tension. The shock is "overkill" in that it helps keep the belts running smoothly while the engine is running. its sole purpose is to help keep the belt shock (when you start and stop the AC compressor) from creating slack, where it could move out of line..

HTH.
 

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1993 MB 400SEL; 1986 190E 2.3-16 w/ MS II EFI
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211 Posts
On my 86 190E 16V, there is a long nut on the belt tensioner that you can adjust to tighten the belt. There could be one on your car so I suggest looking for one and tighten it first before buying parts.
 
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