Limp Mode - stuck in gear - no electrics - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

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#1 Old 08-09-2015
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Limp Mode - stuck in gear - no electrics

Hi All,

Just thought I would share an issue I had to see if it helps anyone.

My 2000 SLK 170 was having a lovely drive out one sunny day. I came to a junction and went to pull away only to find I was stuck in 3rd or 4th.
The next time I stopped the car went into 1st and stayed there.
I crawled along in 1st and lots of warning lights came on. SRS, yellow triangle, BAS/ESP (Although that does what it wants anyway - see other thread).
I struggled on to my destination and arrived. My first thought was the gearbox oil as the gears seemed to be the main problem.
I checked the oil (Thanks for the dipstick MB - NOT!), that was fine and then fuses etc but no joy.
I called a the RAC who came and plugged their laptop in. There were several codes but they noticed that the alternator was charging at nearly 18v.

A replacement alternator from ebay at Ł35 cured the problem and its been fine since.

Never thought of an alternator over charging, always thought they would under charge and the light would come on.

Everyday is a school day!!!

Hope this helps some one.

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