Had my ‘59 plate Mercedes E350cdi for about 5 years now and after a couple of years started researching tuning options knowing there were performance and efficiency gains to be had on such a diesel. A great car and was a bit anxious about reliability issues following a stage 1 tune as I’ve never had to do a thing on the car other than usual consumable items, pads, discs, wipers, tyres etc. The car is pretty much bulletproof and good for at least another 150k that it currently has on the odometer.
Lovely guy came out from Celtic to my place of work and within the hour after ECU whipped out from under front wheel arch, the remap was done and I was out for a quick test drive.
The increase in power is even more than I could have hoped for - +63bhp and +77lb/ft is suggested and whilst only a session on a rolling road would prove it, I’ve little doubt it’s all there. I’ve noticed from 40mph particularly it is now a hoot and joint a motorway even more effortless than before.
The car has never been a sports car but even more of an effortless performance cruiser than previously. It’s actually made me decide to keep the car for a couple more years. As such a bargain of a thing to have done and if I do get the BMW 640d I’ve promised myself next, the tuning guy said they can do wonders for that too, getting 313bhp to nearer 400bhp.
Can’t comment on mpg gains at this stage as I keep marvelling at the extra grunt I’ve got. Great communication from Celtic and an effortless process.