May Winter is advisable to keep the glow plugs button 2-4 seconds. Even if the engine starts, do not work round because there is no detonation same in all cylinders. Then the least keep the spark plugs and engine shake see disappear. For all new generation cars, after starting in May relay remains active for 1-3 seconds just what I explained above.
The 6.2 diesel engine needs to warm up 8 spark plug who eat very much power (if you know the starter and spark hand on you every chance to instantly download the batteries).
You start in the morning and then keep the spark plugs. From batteries to take much power to spark plugs, spark plug boot and again. The alternator is the maximum load. So subscribe to the fellow said: unstretched belt alternator is sufficient, or very worn.
There lies a lot. How I made two weeks ago and yesterday I changed the bearing behind the pulley (which was destroyed).
If someone needs to change it, change the code is 6203 and in 30 minutes.