- Jun 20, 2009
- Reaction score
- Cork, Republic of Ireland
- Your Mercedes
- Jeep Grand Cherokee OM642 power
Well, I know they are slow and mine pulls quite well in first and second and third. But in 4th and 5th it is completely dead, doesn't seem too interested in going over 85mph to be honest. Now she was off the road for the last year, the air filter is clean. If the exhaust was blocked I presume it wouldn't pull well in the lower gears. When new these were meant to do 109 according to the net. Will exercise improve her gradually ?