irratic

HI Guys its me and the merc again Planned a long trip today but had to turn back home, about 5 km from home at about 120km/h the car dipped like when you take your foot off the accelerator only i didn't, so i stepped on the pedal and everything was back to normal... until about another 5km...

I have sprinter 311cdi I replaced the alternator recently, not the dealer (at 707.88 euros after a deduction of 118.00 euros!! for my old one) I disconnected the batterie before doing this. Now the engine sometimes runs OK but most times it is restricted to 3000 revs. If I stop anywhere it...

Am hoping someone can help me it's my clk 230 convertible 2002 model. Sometimes / more than often when stopping at a junction the car's tick over goes up and down forcing the car to lurch forward. Even in neutral the revs still up and down , on the rev counter it looks like between 500 and 1000...

The speedo has always been like this, even when I bought it, but gradually it's become worse. It would normally only jump from 0-20mph when accelerating from a stop, now sometimes you don't get up to 50mph before it jumps from zero. Why is it doing this? Someone said something to me about a...