What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks
Why doesn't my Volkswagen Touareg's cruise control work on downhill slopes?
I purchased a Volkswagen Touareg 3.0TDI new six months ago and am delighted with it, but on a steep hill in Argyll the vehicle runs away with me over the pre-set speed on 55mph. It was in the dealer’s last week under warranty, the outcome being that I was told that I would need Adaptive Cruise Control to solve this problem.
I Googled ‘adaptive cruise control’ to find that that would not solve the problem as it was intended to maintain a pre-set distance between me and the car in front via some form of radar. I then checked the owners manual (which I should have done to start with) to discover that cruise control was not to be used in descents down steep hills. I have previously owned three Mercedes-Benz MLs as well as a BMW 635D and cannot recall having this problem. Is the Volkswagen system inferior to that of Mercedes-Benz and BMW?
I Googled ‘adaptive cruise control’ to find that that would not solve the problem as it was intended to maintain a pre-set distance between me and the car in front via some form of radar. I then checked the owners manual (which I should have done to start with) to discover that cruise control was not to be used in descents down steep hills. I have previously owned three Mercedes-Benz MLs as well as a BMW 635D and cannot recall having this problem. Is the Volkswagen system inferior to that of Mercedes-Benz and BMW?
Asked on 7 December 2013 by JN, Newton Mearns
Answered by
Honest John
A lot of standard cruise control systems do not always work downhill at lower speeds. I was experimenting yesterday with mine, trying to use it to maintain 30mph, but it would not brake the car sufficiently on downward inclines. It's because they attempt to use engine braking rather than the brakes to slow the car and, of course, that doesn't always work with an automatic transmission unless it's 'locked up' in top gear.
Similar questions
More than once in your column I've seen complaints by readers that cruise control is a fuel waster. I was always under the impression that cruise control allows the engine management system to select the...
Some many years ago I was employed in the ‘Met’ as a traffic officer and trained at Hendon Driving School where I attained certificates as advanced motorcyclist, car driver and vehicle examiner. I am incidentally...
I thought you might like to comment on the way the 2007 Lexus IS250 cruise control operates when resuming from a speed below that saved in the system. Rather than accelerating steadily (cruising?) back...
Related models
.jpg?width=115&height=75&rmode=crop)
As comfortable and imperious as a Range Rover, spacious cabin and boot, classy and understated image.
Elsewhere on 
.jpg)
